Pilots from different countries understand body signals if they have the correct training. When you wave your arms up and down in a straight line, it means "yes".

如果接受了正确的训练，来自不同国家的飞行员都能理解身体信号。当你沿一条直线上下摆动手臂时，就表示“是”。

youdao

Then the wise man took a piece of paper and drew a straight line down the middle.

然后，智者拿出一张纸，在中间画了一条直线。

youdao

Stand side-on to a bench with your closest hand and knee on the bench, back parallel to the floor (neck in line) and a dumbbell in your other hand, arm hanging straight down.

侧立于练习凳一侧，靠凳一侧的手与膝支撑于凳。背部与地面平行(与颈部成一条直线)，另一侧手手持哑铃，手臂垂直悬于体侧。

youdao

It is an example of what I call the imperialism of the straight line, where you have large boulevards that you can march armies down to, reviewing stands and all of that, totally different than Moscow.

我所称的帝国主义直线型风格的范本,有足以让军队列队通过的宽阔的林荫大道,还有阅兵台之类的设计,这些和莫斯科太不一样了

耶鲁公开课 - 欧洲文明课程节选

So here we have energy increasing on the y-axis, and you see this straight line at the bottom here is lower down on the graph, and that's the energy of a bound electron, so that's going to be a low stable energy.

这里我们看到能量沿着y轴增加，而且在这张图片上,这条直线在底部是降低的，那是一个束缚电子的能量，所以那是一个低稳态能量。

麻省理工公开课 - 化学原理课程节选

So here's the straight line, and this line is the expected payoff to Player I from choosing Down as it depends on the probability that the other person chooses Right, and then once again, we can write down the equation.

这就是第三条直线了,它表示参与人I选择下获得的收益,是另一个参与人,选右概率的一个函数,对于这一条直线,我们依然能够给出方程式

耶鲁公开课 - 博弈论课程节选

Even when news stories play it straight down the "he says, she says, " line, who, as a parent, are you going to believe: the company protesting that its toy, usually assembled in China, is just fine and dandy, or the "watchdog" group warning that it's frighteningly dangerous and waving a test to prove it?

FORBES: Medialand

Bryant settled the Lakers down by taking the ball inside and getting to the foul line, scoring six straight.

NPR: Bryant, Lakers Roar Back Against Hornets, 108-102

Companies seldom fall in a straight line so there will be plenty of false rallies but nonetheless the trend will be down.

FORBES: Here's What's Next For Apple