You can deal with this by saying not just 5 km, but plus or minus 5 km.
你不能只说5公里,而应该是+5或者-5公里
This is the plus or minus, so the product of the uncertainty and the momentum.
是加或减,所以不确定度和动量的结果。
So we can have, if we have the final quantum number m equal plus 1 or minus 1, we're dealing with a p x or a p y orbital.
所以如果我们有,磁量子数m等于正负1,我们讨论的就是px或者py轨道。
Anything where you're actually keeping track of something like a score that's having a variable that you increment -- plus, plus, or decrement, minus, minus, using the appropriate puzzle piece could certainly be compelling.
你需要保存像分数这样的事物时,你就需要一个变量,它可以自加,++,或者自减,要使用正确的拼图。
It is the value plus or minus something.
而是这个值加上或减去某个东西。
That's equal to seven minus six minus two 3 times 4.19, or 4.19 plus 2.3.
算出来是7-6-2*4。19的平方,或者4。19加2。
It's always a good first approximation, because you need to start somewhere in terms of drawing Lewis structures, but then if you go and figure out the formal charge and you just have lots of charge separation or very high charges, like a plus 2 and a minus 2 and a minus 1 all different places in the atom, what it should tell you is maybe there's a better structure.
它总是一个好的第一近似,因为在画路易斯结构的时候,你总需要一个起点,但是如果你在算出形式电荷之后,发现有很多电荷分开了,或者说有很高的电荷,比如有一个正二,一个负二,还有一个负一1,在原子的各个地方,这应该就是在告诉你,或许还有一个更好的路易斯结构。
We can write out what it is for any certain atom or ion x, X so it's just x plus an electron gives us x minus.
我们可以用,X,来表示一个任意的原子或离子,因此可以写成,X,加一个电子等于负一价的。
1 Similarly, if m is equal to either plus 1 or minus 1, py we would in turn call it the p y orbital, or the p x orbital.
类似的,如果m等于+1或,我们可以叫它,或者px轨道。
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