/'dʌblɪ; `dʌblɪ/
adv (used before adjs 用于形容词之前)
1 to twice the extent or amount 加倍地
*Make doubly sure that all the doors are locked, ie check twice. 再查看一下是否所有的门都锁好了.
2 in two ways 两方面地; 双重地
*She is doubly gifted
*as a writer and as an artist. 她又是作家又是艺术家, 有双重天赋.

adv
[+ adjective]
much more than usual
　Be doubly careful when driving in fog.
in two ways or for two reasons
　You are doubly mistaken.