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1·She tried extra hard.

她特别努力。《牛津词典》

2·That makes it extra hard to learn and practice it.

这使得学习和练习英语变得特别困难。

3·I hugged him extra hard.

我格外使劲地搂了搂他。

4·They worked extra hard.

他们工作特别努力。

5·He works extra hard.

他特别努力。

6·Really? I've been working extra hard lately.

真的吗？最近我特别用功。

7·And I promised her that I am going to work extra hard to get it.

我当时向她保证，为了拿到金牌一定会加倍努力。

8·Many people think, 'If I work extra hard, I'm going to get noticed.

我知道有很多人在公司和前任配偶幽会。

9·Many people think, If I work extra hard, I'm going to get noticed.

很多人会这么想：“只要我努力工作，我总会被人注意到的。”

10·In order to get good results in the exams, she is working extra hard.

为了在考试中争取佳绩，她额外用功。