doubly sure 非常确定
doubly difficult 极其困难
doubly important 非常重要
doubly precious 非常珍贵
A: Are you doubly sure about this decision?
A：你对这个决定非常确定吗？
B: Yes, I have thought about it very carefully.
B：是的，我已经非常仔细地考虑过了。
1) 两倍地；两次地
2) 极其地；非常
3) 加倍地
1. 两倍地；两次地
adverb
1. In a double manner; in two ways; twice as much.
2. To a very great degree; extremely.