随着我们变老，我们的皮肤变得更加苍白。

As we age, our skin becomes paler.

《柯林斯英汉双解大词典》

我老走神，一再回想起我们上次在一起交谈的情景。

My mind kept straying back to our last talk together.

《牛津词典》

我们的一些老传统已经失传，无法追溯。

Some of our old traditions are irretrievably lost.

《牛津词典》

In fact, there are some very old books that show this as the average, the sum divided by two arithmetic mean, but the modern practice is to use the geometric mean.

事实上，一些很老的书籍上,平均的定义就是算数意义的，总的来说被分为两种算数意义，但现代我们多用几何意义。

麻省理工公开课 - 固态化学导论课程节选

So it's like a tie between the old and the new and I think the CD-ROM does that clop and CD old pictures, the festival dress.

这就像过去和现在之间的纽带,我认为之前所说的光盘能让,我们聆听到木屐的声音，唱片的老照片能让我们欣赏到和服。

麻省理工公开课 - 媒体、教育、市场课程节选

And so frequently what we try and do is, we take a new problem and map it onto an old problem so that we can use an old solution.

我们经常做的一件事就是，我们处理一个新问题时,把它归结为一个老问题,以便我们能采取老的解决方式。

麻省理工公开课 - 计算机科学及编程导论课程节选