“我知道我想成为一名工程师，因为我喜欢制造东西来帮助解决世界问题。”杜说。

"I know I want to be an engineer because I like building things to help solve world problems," says Du.

youdao

正是由于它，使得大量的现实世界问题得以解决。

Thanks to mathematics lots of real world problems are solved.

youdao

现在，他相信企业能在解决世界问题上扮演重要角色。

Now he believes that companies can play a big part in solving the world's problems.

youdao

And so, in the real world frankly, these kinds of questions, how much time is this gonna take is certainly germane.

但在现实世界中，不同种类的问题，所花费的时间是不同的。

哈佛公开课 - 计算机科学课程节选

Of course, the problem is, we're distracted by the comings and goings, the hurly burly of the ordinary everyday world.

但问题在于,在这个普通寻常的世界上,来往喧嚣吸引了我们的注意力

耶鲁公开课 - 死亡课程节选

Throughout the world, there are literacy and illiteracy substantial problem.

世界上存在很多,文化素养以及文盲的问题存在。

麻省理工公开课 - 媒体、教育、市场课程节选