Very clever people try to learn them.

非常聪明的人试图学习它们。

youdao

Anyone can learn them.

人人都能学习它们。

youdao

Now, I am interested in all the subjects and work very hard to learn them well.

现在，我对所有的科目都感兴趣，并且非常努力地学习它们。

youdao

It contained all the necessary information about the moon and stars that sailors would need to help them learn their longitude.

VOA: special.2010.07.14

If they're not obvious to you what they're called, you need to just study them and learn them.

如果它们不想它们的名字那么显而易见，你们需要学习它们记住它们。

麻省理工公开课 - 化学原理课程节选

Because there are no articles in the Korean language, so that makes it really difficult to learn them in English.

因为韩语里面没有冠词一说，所以对他们来讲学习英语冠词真的很难。

韩国人经常犯的失误 - SpeakingMax英语口语达人

He demanded that we find out the lessons, that we learn them, and that we fix the problems.

NPR: White House Unveils Disaster-Response Measures

You need to learn them if you do not know what they are.

FORBES: Annual Performance Review: Time Suck or Amazing Opportunity

Find out what are the hot skills in the market and learn them (or as many as you need to be marketable).

FORBES: Own Your Career, Stop Waiting on a Savior