而且为什么局外人要花费时间精力保护这些不认真保卫自己的国家呢？

And why should outsiders bother to protect countries that won't take their own defence seriously?

youdao

我认为，如果仅仅是为了资源，一个外星种族可能不会花费时间精力来掠夺地球。

I'd argue that if it's just about resources, an alien race probably wouldn't bother pillaging Earth.

youdao

厌倦是一个普遍存在的现象，因为它是如此普遍，因此人们很少花费时间精力对它进行调查研究。

Boredom is one of those really common things that, partly because it's so common, is rarely investigated with much rigor.

youdao

And this course in particular isn't at the end of the day about programming even though that is in fact how you will spend a good amount of your time and the skill that you will in fact walk away with.

尤其特别的是,这门课程最终的目标,不是教会你编程,尽管编程会花费你们大量的时间和精力。

哈佛公开课 - 计算机科学课程节选

spent a lot of time and effort kind of figuring out what is it that people will want to buy next week.

他花费了很多的时间和精力来研究,人们想要在下个星期买进什么。

耶鲁公开课 - 金融市场课程节选

But they spent a lot of time, energy, and money on being sure that they would have a supply of water to hold them for a long siege.

他们花费了大量的时间,精力,和金钱来确保,在长期的围城中他们可以获得足够的水源

耶鲁公开课 - 古希腊历史简介课程节选