n. 两倍
a. 两倍的, 双重的
vt. 使加倍
vi. 加倍, 代替, 快步走
[计] 双精度型
英文释义
n. a base hit on which the batter stops safely at second base
n. a stand-in for movie stars to perform dangerous stunts
n. someone who closely resembles a famous person (especially an actor)
n. a quantity that is twice as great as another