他正好有我需要的零件，那真是碰巧的好运。

He had exactly the part that I needed so that was ___a ___stroke ___of ___luck.

面试后立即得到工作机会，真是运气好。

It was ___a ___stroke ___of ___luck that she was offered the job immediately after the interview.

在档案中找到那份罕见的手稿对历史学家来说真是碰巧的好运。

Finding that rare manuscript in the archive was ___a ___stroke ___of ___luck for the historian.