And, we are going to shoot a ray from the origin towards this point, and we want to know what portion of the ray is in our solid.
然后从原点引一条射线到这个点上,需要知道射线的那部分在我们的立体中。
Once you reach this point, the only way to get more progress towards your goals is to stop doing work.
一旦你达到身体负荷的最大点时,获得目标的唯一的方法就是停止工作。
This is done by pumping fluid towards the bow, which pitches it down for a dive, or sending it towards the stern to point the nose up when ascending.
这通过将液体抽向船首来完成,这将使它的头部下沉,或者当上升时把液体抽向船尾让船首上翘。
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