1.Once upon a time 很久以前

例句：Once upon a time, there was an island where all the feelings lived: Happiness, Sadness, and all of the others, including Love.
从前，有一座小岛上面居住着所有的情感，有幸福，悲伤和包括爱在内的其它所有的情感。

2. on no account 决不能

例句：On no account could she agree to a step which might afterwards cause bitter rueing to her husband for his blindness in wedding her.
她决不能同意迈出这一步，免得以后导致丈夫后悔，说是瞎了眼睛才娶了她。
3.revealed that 透露
例句：Last week, when South Korean officials announced the arrest of a North Korean spy,they revealed that one of the spy's objectives was to locate Hwang.
上星期，在韩国官员宣布逮捕了一名北韩间谍时，他们透露这名间谍的任务之一就是寻找黄长烨的住处。

4.By that time 那时

例句：By that time you will be making money and can afford a lawyer to get it done right.
到那时，你将会赚很多的钱能使你请一个律师来帮你处理好一些的。