動詞 double up:

1. bend over or curl up, usually with laughter or pain
   同義詞：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
   同義詞：parlay

1. The carpet is too thick to double up.
   這地毯太厚沒法折疊。
2. The rug won't double up.
   這條地毯卷不起來。
3. Come on, comrades. Double up.
   來，同志們，趕快！
4. Please double up the chair and put it aside.
   請把椅子折起來放在一邊。