棘轮上的每一个齿有两个边,一个向上,一个向下。
Each tooth on a ratchet has two sides, one that goes up and one that goes down.
两个硬币,一个好一个坏,就像是一个齿的两个边。
The two coins, one good and one bad, are like two sides of a single saw-tooth.
莱特决定的是冲到屋子另一边去,而且是大开着齿嗓。 他的这个决定现在被证明对谁都是一个灾难。
Mr Wright's decisionto come across the room with his mouth wide open is proving a disaster for allconcerned.
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