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1·You have to keep encouraging them and checking on them. Just like Danny, for some children, getting them to go to school is the toughest thing.

你要一直鼓励他们并检查督促他们。就像丹尼一样，对一些孩子而言，让他们坚持上学是最难的事情。

2·He faces the toughest test of his leadership so far.

他面临迄今为止对自己的领导工作最严峻的考验。《牛津词典》

3·This is the toughest crime bill that Congress has passed in a decade.

这是十年来国会通过的最强硬的有关犯罪的议案。《柯林斯英汉双解大词典》

4·He is the toughest military ruler yet and has responded harshly to any dissent.

他是迄今最苛刻的军事统治者，残酷地回应任何异议。《柯林斯英汉双解大词典》

5·Malaysia has emerged as the toughest critic of the North's environmental attitudes.

马来西亚已成为对北方发达国家环境态度的最强硬的批评者。《柯林斯英汉双解大词典》

6·They live in precarious balance and one of the toughest environments on earth.

他们生活在不稳定的平衡中，并且这是地球上最艰苦的环境之一。

7·The manticore is the most fearsome of Pandoran predators, and by the look, it might be the toughest carnivore in the known universe.

蝎尾兽是潘多拉星球上最可怕的食肉动物，从外表上看，它可能是已知宇宙中最强悍的食肉动物。

8·As time passed and work with their respective first clients became more and more difficult, John and Sue realized that they had been assigned two of the toughest clients in town.

随着时间的流逝，和他们各自的第一批客户一起工作变得越来越困难，约翰和苏意识到他们被分配给了镇上两个最难对付的客户。

9·This is the toughest step for me.

对我来说这是最难的一步。

10·The toughest part was the waiting.

最难捱的莫过于等待。