与此同时，他的密友恩格斯经常写信表扬他努力学习英语。

At the same time, his close friend, Engels, often wrote to praise him for his hard work in learning English.

youdao

你应当像玛丽那样努力学习英语。

You should study English as hard as Mary does.

youdao

一些人努力学习英语并获得了成功。

Some people try hard to learn English, and succeed.

youdao

你必须努力学习英语，以求精通。

You must work hard to acquire good knowledge of English.

youdao

老师经常鼓励我们努力学习英语。

The teachers often hard at English.

youdao

实际上，我们仍然需要努力学习英语。

In practice, we still need to study English hard.

youdao

虽然他很忙，但是他还努力学习英语。

Although he is very busy, he studies English very hard.

youdao

我希望你们努力学习英语，天天向上。

I hope you work hard at English and make progress every day.

youdao

我不遗余力地努力学习英语。

I will spare no effort to study hard at English.

youdao

从现在开始，我一定要更努力学习英语。

From now on, I will study English harder.

youdao

我们必须努力学习英语。

We must study English hard.

youdao

让我们努力学习英语吧！

Let's study English hard.

youdao

王海正在努力学习英语。

Wang Hai is working hard at his English.

youdao

你为什么努力学习英语？

Why do you study English hard?

youdao

我答应去努力学习英语。

I promise to study English hard.

youdao

我们应该努力学习英语。

We must work hard at English.

youdao

你最好努力学习英语。

You'd better study English hard.

youdao

我在努力学习英语！

I strive to learn English!

youdao

我也努力学习英语。

I study English hard as well.

youdao

我想做一名综合型人才，所以我努力学习英语。

I want to be an integrated talent, so I work hard on English.

youdao

我努力学习英语。

I work hard at English.

youdao

我努力学习英语。

I work hard at English.

youdao