释义：
Speaking of 说起……
如果是之前已经提到过的话题，就可以用来追加相关的话题。想要具体指明已经提到的对象就可以说 Speaking of+名词，想要表达“说到……”，就可以用 Speaking of which。
例句：
Speaking of winter, did you go skiing this year?
说到冬天，你今年去滑雪了吗？
Speaking of Brian, I have some big news.
提到布莱恩，我有些特大新闻。
Speaking of which, are you ready to go to lunch?
话说回来，你准备好去吃午饭了吗？
对话：
A: These chocolate candies are great.
这些巧克力糖果非常不错。
B: Speaking of chocolate, you should try the cookies.
说到巧克力，你应该尝尝这些饼干。
