Tolstoy spent his whole life trying to answer these difficult questions.

托尔斯泰一生都在试图回答这些难题。

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While it may be fun to have your own money to spend, it can also be difficult trying to manage it properly.

虽然有自己的钱花可能很有趣，但要想正确地管理它也很困难。

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Let's say you are trying to learn some new and rather difficult English vocabulary using a stack of cards.

让我们假设你正试图用一堆卡片来学习一些新的、相当难的英语单词。

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Many of his stories are about a child trying to survive while facing difficult emotions such as fear.

VOA: special.2009.10.05

But then also a little bit about your history, where you come from, some of your experiences which have helped you or informed your opinions on this very difficult issue that the entire world really is spending a lot of time trying to work on.

然后再谈谈你们各自的经历，你们从何而来，谈一些你们自己的经历,一些帮助过你们，或形成了你们,就这个复杂问题的观点,这个全世界都在投入大量时间试图解决的问题。

普林斯顿公开课 - 人性课程节选

So if you're trying to make a more complicated organic molecule carbon-carbon bonds are one of the most difficult things to make in organic chemistry, and it turns out that c n minus is a very reactive molecule, so it's a good way, even though we'll go over some drawbacks in a second, it is a good way to make carbon-carbon bonds.

如果你要合成一个更复杂的有机分子,碳碳键是有机化学中,最难制造的键之一，而实际上氰离子是一种具有很高活性的分子，用它是一个好办法，尽管我们一会儿将看到它的一些缺点，但它的确是一个制造碳碳键的好方法。

麻省理工公开课 - 化学原理课程节选

Farther of a two-year-old son, Zhou finds it dreadful and difficult trying to cook different and nutritious meals everyday for the whole family.

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She said it had been difficult trying to reproduce the new album live because "it's so intimate in some respects and then so rude in other respects".

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"After I was discharged from the military, it was difficult trying to become a civilian, " he told a lawyer during a deposition for a lawsuit last November.

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