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At first it meant hitting a spot at the center of a target with an arrow.
VOA: special.2009.09.20
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Some people like to use an arrow, and the arrow points in the direction of the more electronegative end.
也可以用箭头，箭头指向,带负电的一极。
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Here I paused in my fiction to shield my eyes and stanch the arrow-straight tracks clawed down my cheek.
飞箭在我脸上笔直地犁出了一条伤口，我停止了幻想,遮住眼睛，赶忙去止血。
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Professor Wobbrock says it uses a large circular cursor instead of the traditional arrow pointer.
VOA: special.2011.04.18
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And I am going to let this arrow somehow indicate the value of the incident energy.
我将用这个箭头,来揭示,入射能量的值。
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He's got a full-feathered headdress. Or he's sitting cross-legged with his moccasins and a bow and arrow and a tepee in the background type of thing."
VOA: special.2010.11.29
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Instead if we want this pointer to represent the address of something in as much as it points at that address let's just draw an arrow.
如果我们想要让这个指针表示,数据的地址，它指向的地址,我用一个箭头表示。
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He is reaching his bow and arrow up to the sky.
VOA: special.2009.11.13
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Perhaps it's clear to you that no matter how your axes are oriented, when you ask, "How long is this arrow?"
这应该是比较显然的,无论坐标轴指向哪里,当你问,"这个矢量有多长"
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He tested his skills using a bow and arrow.
VOA: special.2010.08.06
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So if I get rid of these arrows, there's no heat flowing because they're in thermal equilibrium, then I can't have an arrow here.
所以如果我擦去这些箭头，没有热流存在,因为它们处于热平衡，那么这里也不能存在一个箭头。
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Earlier this year, Tehran's arch-enemy Israel test fired its own Arrow 2 missile in a simulation of stopping the Shahab-3.
VOA: standard.2009.09.28
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He released the arrow, it tore her belly, It cut through her insides, splitting the heart.
他放箭刺穿了她的肚皮，箭刺破她的内脏，心脏也破裂了。
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That is our mission,". "And the president described it in no uncertain terms in his inaugural when he said, 'Our nation is at war against a far-reaching network of violence and hatred.' And to win this war against al-Qaida, the administration continues to be unrelenting, using every tool in its toolbox and every arrow in its quiver,"
VOA: standard.2009.08.06
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So if we want to put that in chemical terms, we want to make sure we put these in brackets here, and remember, this is the resonance arrow, it's not a reaction arrow, it's a resonance arrow, so make sure you mark it up correctly like that.
那么如果我们把它类比到化学中来，我们要确保它们都放在括号里，而且要记住，这是一个表示共振态的箭头，而不是表示化学反应的，它是一个表示共振态的箭头，因此请务必像这样正确地标记它。
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That's what this arrow at the right shows, the direction of the flow of information.
这就是右边这个箭头的含义,即信息流动的方向
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One should do," he says, "what archers do when attempting to reach a distant target, namely, aim your bow high, knowing that the force of gravity " will bring the arrow down."
他说：，“一个人应该做的是，模仿伟人所为,当试图达致遥不可及的目标时，意即将目标设高，明了重力会将,射出的箭吸回地面“
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The proper way to draw a vector is to draw an arrow that's got a beginning and it's got an end.
画矢量的正确方法是,画一个有起点和终点的箭头
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And I have purposely made the arrow shorter to indicate that it has been slowed because we are going to argue its mass didn't change, so the only way to change its energy is to change its velocity.
我已经故意将这个箭头弄短,用来象征它变慢了,因为我们将证明它的质量没有变，只有它的能量改变了,也就是它的速度变了。
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Scratch This Boolean expression allows you to say to scratch if you are touching the mouse pointer, the little arrow, do something. How do we do something?
布尔表达式允许你告诉,当你触碰到鼠标指针，也就是小箭头，程序就相应地做一些事情？
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If you want to talk about an arrow of any kind, you've got to put a little arrow on top of it.
如果你问要画什么箭头,只要在上面画个小小的箭头就行
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That limit will be some arrow we can call the velocity at the time and it will always be tangent to the curve.
那个极限也就是一个矢量,我们称之为瞬时速度,并且它总是和轨迹相切的
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You can kind of see where the syntax is going, looks like a loop, but you can kind of put blocks inside of you, and the little arrow suggests that once you get to the bottom just like our socks example, you're gonna do the following again.
从某种程度上你可以看到它的语法构成,像个循环，你也可以把，一些程序块放到循环中，如同短袜的例子，这个小箭头暗示你一旦到达底部,你将会重复接下来的事情。
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That's why we don't have an arrow here, because we could go back, this way too.
这就是为什么我们这里没有用箭头的原因，因为我们可以过渡回去，像这样。
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The picture is more compelling with an arrow at this point.
在这里这张图中的箭头是扣人心弦的。
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If right arrow key down, move right.
方向键，就往右走。
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Now I'm hitting the down arrow.
先在我敲下箭头键。
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But since in drawing Lewis structures actually, in some cases you do, you can draw a dotted line that means a 1 and 1/2 bond, but most in most cases, we just draw out both resonance structures, and the way that we say it's a resonance structure is that we put it in the brackets and we put an arrow between it.
但是由于在画路易斯结构时,其实，在某些情况下是可以的，你可以画一条虚线来表示一又二分之一键，但是在多数情况下，我们就把两个结构都画出来，而我们说这是一个共振结构的表示的方法是,把它们放在括号里，并在中间放一个双箭头。
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Pick any two perpendicular directions Then the same entity, the same arrow which has an existence of its own, independent of axis, can be described by you and me using different numbers.
选取两个互相垂直的方向,这样同样的物体,同一矢量,并且是独立于坐标轴而存在的,可以被你和我用不同的数字来描述
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If you drop the arrow, it's the usual convention, if you're talking about the length of the vector A.
如果你把箭头去掉,就表示矢量 A 的模长,这是约定俗成的
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