1、At first, she wanted to call the guards, but on second thoughts she changed her mind.
起先，她想叫衛(wèi)兵，但是一轉念又改變了主意。

2、He did not intend paying the bill, but on second thoughts paid it.
他并未打算付賬，但經(jīng)重新考慮后還是付了。

3、So, on second thoughts agreed because I realized a little discomfort2 could end up helping someone.
所以經(jīng)過一番仔細思考后，我同意了，因為我了解一點點的不舒服最后可以幫助某人。

4、On second thoughts he changed his mind.
進一步考慮后,他改變了主意。

on second thoughts翻譯