男孩的裤子后裆上有一个洞。

There is a hole in the seat of the boy's trousers.

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她正在修补旧裤子的后裆。

She is seating an old pair of trousers.

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他的旅行大衣被撕成了大小不同的两块，他的裤子现在很象某些印第安人喜欢穿的那种预先把后裆剪下来的套裤。

His travelling overcoat was divided into two unequal parts, and his trousers resembled those of certain Indians, which fit less compactly than they are easy to put on.

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