They all doubled up when I told my joke.
当我讲笑话时, 他们都笑得直不起身子来。
They all doubled up when I told my joke.
当我讲笑话时, 他们都笑得直不起身子来。
The sad news doubled him up.
噩耗使他悲
。
Because of the housing shortage, many couples had to double up in one tiny apartment.
由于
房紧
, 
对夫妻只好挤在一栋公寓里。
The carpet won't double up.
这地毯不能折起来。
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