She reaches in, digs her hand deep into the ball, and pulls out a slip of paper.
她把手伸进去,手臂深深插入球中,抽出一张纸条。
The structure of the guiding ball type limited slip differential is introduced. The principle of differential motion and slip limitation are dictated.
介绍了导球式限滑差速器的结构,论述了其差速运动及限制滑动的原理。
He rolled the slip into a little ball and swallowed it.
他把纸条揉成小团,吞了下去。
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