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1·Many aspiring young artists are advised to learn by copying the masters.

许多有志向的年轻艺术家们被建议通过临摹大师们的作品来学习。《柯林斯英汉双解大词典》

2·Something that you learn by direct seeing is called an observation.

通过直接看到了解到的东西叫做观察。

3·I think our discussion of sauropods will illustrate what we can learn by comparing the fossil record to modern animals.

我认为，对蜥脚类动物的讨论将解释我们通过比较化石记录和现代动物所了解到的东西。

4·Its somewhat ambitious title was The Book of Life and it attempted to show how much an observant man might learn by an accurate and systematic examination of all that came in his way.

这本书有点野心勃勃的书名是《生命之书》，它试图表明，一个善于观察的人，通过对他遇到的一切事物进行准确而系统的考察，可以学到多少东西。

5·Its somewhat ambitious title was The Book of Life, and it attempted to show how much an observant man might learn by an accurate and systematic examination of all that came in his way.

《生命之书》这个书名或许有些野心勃勃，这本书试图说明，一个善于观察的人，通过所遇之事进行准确而系统的考察，可以学到多少东西。

6·We all learn by experience.

我们都从经验中得到教益。《牛津词典》

7·There is a lot we can learn by studying mistakes.

通过研究错误，我们可以从中学到很多东西。

8·I would feel lonely if I had to learn by myself.

如果我只能自己学习，我会感到孤独。

9·You might use a keyboard to write an article, but you should learn by hand during a class.

你可以用键盘写一篇文章，但在课堂上应该用手学习。

10·In other words, with or without these courses, they can make it anyway, because they are those who have the ability to learn by themselves.

换句话说，不管有没有这些课程，他们都可以做到，因为他们有自学能力。