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。
宿一室；把…对折；弯曲；快跑；加把劲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.
噩耗使他悲痛欲绝。
Because of the housing shortage, many couples had to double up in one tiny apartment.
由于
房紧张, 许多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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