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1·It was a difficult task but we brought it off.

那是一项艰难的工作，但我们还是完成了。《牛津词典》

2·To water the trees was a difficult task for one man.

给这些树浇水对一个人来说是一项艰巨的任务。

3·The man in blue is too old to finish the difficult task in such a short time.

这个穿蓝衣服的人太年长了，不能在这么短的时间内完成这项艰巨的任务。

4·In fact, to learn with success is not a very difficult task if you follow some basic rules.

事实上，如果你遵循一些基本的规则，成功地学习并不是一件非常困难的事情。

5·It's best to take on the most difficult task second—once they're settled, but before they get tired.

最好是之后再做最困难的任务——在他们适应之后开始，但要在他们感到疲倦之前结束。

6·As a ballerina, to embody the duality of the Swan Queen and the black swan can be a fiendishly difficult task.

作为一名芭蕾舞女演员，体现天鹅女王和黑天鹅的二元性可能是一项极其困难的任务。

7·She's set herself a difficult task.

她给自己安排了一项艰巨任务。《牛津词典》

8·She's set a difficult task for herself.

她给自己安排了一项艰巨任务。《牛津词典》

9·The identification of the crash victims was a long and difficult task.

鉴别坠机意外伤亡者的工作费时而且困难重重。《牛津词典》

10·In a study, researchers gave three groups of six-year-old children a difficult task to complete on a computer.

在一项研究中，研究人员给三组六岁的儿童安排了一项困难的任务，让他们在电脑上完成。