Exsuse me? Fine. You can be in charge. You fix the plane.
你说什么?好吧，你负责，你来修飞机。
OK, so I fix x equals constant. That means that I slice by a plane that's parallel to the blackboard.
因此我使x等于一个常数，那就是说,用一个平行于黑板的平面来进行切割。
Yes? Yeah, so I'm saying when you fix theta you get only a half plane, not a full plane I mean, it goes all the way up and down, but it doesn't go back to the other side of the z axis. Why?
请说，所以我说当固定θ时,得到的是半平面，而非全平面,它布满z-轴的一侧,但从不延伸到z-轴的另一侧，为什么？
Can you get a fix on the plane?
你能给飞机定位吗？
Without the horizontal plane for placement, a smoker can very conveniently fix the hanging ashtray to a vertical plane.
在无水平面放置的情况下，吸烟者可以很方便地将其固定在某一立面上。
Without the horizontal plane for placement, a smoker can very conveniently fix the hanging ashtray to a vertical plane.
在无水平面放置的情况下，吸烟者可以很方便地将其固定在某一立面上。
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