多年来，我一直在研究全球农业、人口、环境和经济趋势及其相互作用。

For many years I have studied global agricultural, population, environmental and economic trends and their interactions.

youdao

“如果我知道学生们在课堂上使用它，我也会禁止使用它。”萨默斯教授在了解了苹果手机及其功能后，这样评价它。

"I would ban that too if I knew the students were using it in class," Professor Summers said of the iPhone, after the device and its capabilities were explained to him.

youdao

下面我就回顾一下这一术语的历史及其含义。

I will review the history of the term and of its meanings.

youdao

The presumption is that they all reward and demand a certain amount of close reading.

我认为这些诗人及其作品是值得,我们去细细品味并进行深入的阅读研究。

耶鲁公开课 - 现代诗歌课程节选

I'm going to put aside for the moment the question of sign languages and how they work.

我想暂时把手语,及其如何作用的问题先放到一边

耶鲁公开课 - 心理学导论课程节选

But I was working on research involving detection of worms, viruses and the spread thereof.

但我从事的研究涉及到蠕虫的检测，病毒及其传播。

哈佛公开课 - 计算机科学课程节选