一个是我保持a恒定,那么当然b就会变化，因为这个宽是不变的。,那么当改变θ角时，高度增加了，从而这条边的长度增加了。

One is I keep a constant, and then of course b will have to change because if this width stays the same, then when I change theta, the height increases, and then this side length increases.

youdao

风向规律在海洋中不同地区保持着高度的差异，如果它被改变或者增强，它就会将海水从一个地区吹向另一个地区。

Wind patterns maintain height differences between different regions of the ocean, and if altered or intensified, they would push water from one part of the ocean to another.

youdao