首先，利率下调可能比预期的时间要久。第二，贷款可能下降。第三，坏帐可能抵消大部分的成效。

First, interest rates may take longer to fall than is hoped. Second, lending may fall. Third, bad loans could wipe out much of any improvement.

《柯林斯英汉双解大词典》

要解释睡眠和营养之间的因果关系，还有一个挑战，那就是可能有第三个因素对它们两者都有影响。

As yet a challenge to explain the cause-and-effect relationship between sleep and nutrition, there may be a third factor that impacts both of them.

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第三，要促进社会稳定。

Third, to promote social stability.

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Third thing to notice is, there's a flow of control. The order which these things are going to happen.

第三件事情就是,我有一个控制流,这些事情有个要做的先后顺序。

麻省理工公开课 - 计算机科学及编程导论课程节选

I want the function, which is a little tool, a line of code I can include in my own programs and generally those tools live in sections two or three of the manual.

我想要一个函数，那是一个小工具，在我程序中可以包含的一行代码,通常这些工具在手册的第二节,或第三节。

哈佛公开课 - 计算机科学课程节选

The third thing I'm going to do, is I need to set up the right end test.

我要做的第三件事情，就是需要设置正确的完结测试。

麻省理工公开课 - 计算机科学及编程导论课程节选