这是一句欠考虑的话，我马上就后悔了。

It was a thoughtless remark and I regretted it immediately.

《柯林斯英汉双解大词典》

倘使你一定要知道的话，这是我男朋友给的。

It's from my boyfriend, if you must know.

《牛津词典》

万一你需要帮助的话，这是我的电话号码。

In case you should need any help, here's my number.

《牛津词典》

So if in fact I wanted to make sure this was a number, I should have done something like either try and convert it to a number, which of course failed here, or put in a check to say where it is.

因此实际上如果我想确保,这是一个数字的话，我们的课程上的代码,在这里失败了，你或许应该在这里，放一个检查的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

So if I wanted to represent, for example, this is the set two, six and eight, I put a one in those slots.

所以如果我想表示的话，比如，这是2，6，8的集合，我放置一个数在这个位置中。

麻省理工公开课 - 计算机科学及编程导论课程节选

And if you remember this phrase, I don't know why you would, but this will help you learn the lanthanides in order.

如果你能记得这句话的话，我不管你们是怎么做到的，但是这个确实会帮助你按顺序记住镧系元素。

麻省理工公开课 - 固态化学导论课程节选