Speaking of which, what's up with Mark lately?

对了，马克最近怎么样了？

Speaking of which, why don't we have lunch in the cafeteria together?

说到这，我们一块去自助餐厅吃午饭怎样？

It’s a funny world we live in, speaking of which, you wanna know how I got these scars?

咱这世界可真够好笑的，说起来，想知道我这脸上的疤哪儿来的么？

It's a funny world we live in, speaking of which, you wanna know how I got these scars?

咱这世界可真够可笑的，说讫来，想知道我这脸上的疤哪儿来的么？

Speaking of which, if your name is Mel Brooks, Jim Carrey, or Adam Sandler, please send me an email.

说到这儿，如果你叫梅尔·布鲁克斯、金·凯瑞或者亚当·桑德勒的话，千万记得给我发封邮件！

Speaking of which, if a risk doesn't work out, don't let it stop you from taking similar actions in the future.

说到这儿，如果冒险没有成功，不要让它阻碍你今后采取类似的措施。

But how gravity assists work is a topic for another day. Speaking of which – how long would a day be on the sun?

但关于重力助推的运作原理就改天再谈吧。说到这里，太阳上的一天有多长？

But it's the little things--what I ate last week at that new restaurant or even if I liked that new restaurant (speaking of which, what was its name?)--that sometimes slip away.

但是那些小事——上周我在新开的那家餐厅吃的什么，或者甚至是我到底喜不喜欢那家餐厅（你说的是哪一家，叫什么名字来着？） ——有时候就溜走了。