一下子的用法和样例：
例句
-
他一下子就猜中了谜底。
He got the answer to the riddle as quick as a flash. -
他们扬言要一下子取消整个项目。
They threatened to cancel the whole project at a stroke. -
不要一下子全吃光留下一些以后再吃。
Don't eat them all at once; save some for later. -
我不会一下子把坏消息一古脑地倒出去，我会婉转地告诉她。
I won't break the bad news all at once. I'll let her down gently. -
美国汽油价格一下子上涨了百分之四点三。
American gasoline price has risen4 percent.3 in a short while.
