Fifteen minutes passed and then,这半句话里,then是啥意思啊?

Fifteen minutes passed and then,这半句话里,then是啥意思啊? Fifteen minutes passed and then, Fifteen minutes passed and then,at five to twelve,the clock about 15 minutes passed and then 10 (some time) passed and then 和 minutes later的区别 这句英语里的then是啥意思? 【Three months passed and then……】中的【three months passed】是句子还是 since then 是啥意思? Then and only then中文意思是什么? 如何理解这句话里的 then 'Err.Clear 前面的 ' 是啥意思?if err then这句话是if err=0 then 还是 if err and then;but then; so then的区别,哪一个离but then意思更近?