Their first problem was crossing over a huge mountain.

他们第一个问题是翻越一座高山。

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The first problem for Wang was to find the keys.

王的第一个问题是找到琴键。

youdao

The first problem is that ecologists do not all agree what "stability" means.

第一个问题是，生态学家们并不都同意“稳定”的含义。

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Their first problem was crossing over a huge mountain.

VOA: special.2009.02.11

The first problem set will be posted shortly, and that means, you know, we want you just to get going on things. Don't worry, we're going to make them more interesting as you go along.

第一个问题的提出会很快让你们熟悉，意思是说，你们懂的，我们希望你们尽管去放手干，别担心，在你进行的同时我们会,让它们变得更有趣儿。

麻省理工公开课 - 计算机科学及编程导论课程节选

If I want to move into a directory and you'll see-- all of these will be walked through in the first problem set.

如果进入一个目录，你们会发现-,所有步骤都在,第一个习题集中提到过。

哈佛公开课 - 计算机科学课程节选

Dr Bustamante and his colleagues got around the first problem by coating the tip with carbon.

ECONOMIST: How (and why) to find a needle in a haystack | The

Barack Obama's administration has tackled the first problem with plans to help homeowners refinance and avoid foreclosure.

ECONOMIST: The Fed

Another way to pay players and avoid the first problem I outlined is to allow agents to pay players.

FORBES: The Problems With Paying College Athletes