He had decided to give it up, but on second thoughts he decided to try a third time.，关于 a third

Question

He had decided to give it up, but on second thoughts he decided to try a third time.

请问try a third time——是指又一个第三次，还是单纯的又一次；如果是后者的话，third可以换成其他序数词吗？还是必须用third。无论这个又一次实际上是第几次（第二次也好，第一百次也罢）？

非常感谢！

Answer 1

本题考查冠词。On second thoughts 是习语，意思是：三思后，晚些时候做出决定。序数词的前面加上不定冠词，表示再一，又一。A third time 表示再一次，又一次。
理论是可以改的，但是这里承接着second，用third比较好

Answer 2

是固定词组
a third time 指再次，又一次，不表示顺序。
the third time 第三次，强调顺序。

He was made monitor of our class a third time.他再次被选为我们班的班长。
Leave me.I won't tell you a third time.走。我不会再多说一次。本回答被提问者采纳

Answer 3

单纯的又一次，在原先两次基础上。此句不能换作其他。
再试一次， 但这一次必须是第三次，如果是第二次就说 a second time.