风朝哪个方向刮?
你要朝哪个方向转,必须发出信号。
这位总统从未确定在这个问题上自己想要朝哪个方向走。
The president has never been sure which direction he wanted to go in on this issue.
The way to read this diagram is it's as if it were my brain and I am facing this way.
查看这张示意图的方法是,设想这是我的大脑,面朝这个方向
So, if instead you put your particle somewhere down here on the electric field, or on the wave, the electric field will now be in the other direction so your particle will be pushed the other way.
还有方向,所以如果,你把粒子放在这下面,电场的方向相反,粒子会朝另一个方向运动。
And we're going to have q2 prime, and we're going to draw the arrows in the positive direction in these cases.
还有q2一撇,在这个例子中,我们把箭头朝正方向。
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