on second thought的用法和樣例：
例句
- I said I wouldn't do it, but on second thought I think I will.
我說我不會做此事，但再細想一下我想我是會做的。 - He have intended to go, but on second thought, he give up the idea.
他本來想去，但進一步考慮後，打消了這個念頭。 - On second thought I think I'd better go now.
再三考慮后，我想最好現在走。 - You are so bold that you never do something on second thought.
你太魯莽，從來不知道深思熟慮后做事。
