at running speed; very fast
以跑步方式；迅速地
he disappeared at the double.
他很快就消失了。
bend over into a stooping position
弯腰
a gamble to decide whether a loss or debt should be doubled or cancelled
以已输的数额作为最后赌注（或者多输一倍，或者与赢家清帐）
To bend suddenly, as in pain or laughter.
弯腰：因疼痛或大笑等弯下身子
To share accommodations meant for one person.
同宿一室
Immediately.
立即
In double time.
双倍