double up例句

They laugh so hard they double up with laughter.
他们捧腹大笑，直不起身来。

The carpet won't double up.
这地毯不能折起来.

The lids of the casserole dishes are designed to double up as baking dishes.
砂锅的盖子被设计成可兼作焙盘。

• #double up