说起来，我楼上还有两个电池可以给你。

___Come ___to ___think ___of ___it, I've got two batteries that you can have upstairs.

想想看，这真的很难说。

___Come ___to ___think ___of ___it, it really is quite difficult to say.

对了，我们本应该早点订票的。

___Come ___to ___think ___of ___it, we should have booked the tickets earlier.