double up

动词 double up:

1. bend over or curl up, usually with laughter or pain
   同义词：double over, double
2. share a room or a bed designed for only one person
3. stake winnings from one bet on a subsequent wager
   同义词：parlay

1. The carpet is too thick to double up.
   这地毯太厚没法折叠。
2. The rug won't double up.
   这条地毯卷不起来。
3. Come on, comrades. Double up.
   来，同志们，赶快！
4. Please double up the chair and put it aside.
   请把椅子折起来放在一边。