It? S known to all that they do an important and necessary job.
大家都知道他们做的是重要的并且是必要的工作。
It 's necessary for us to eat more fruit and vegetables.
对我们来说，多吃蔬菜和水果是必要的。
It 's necessary for us to help each other.
我们互相帮忙是必要的。
It 's necessary for you to lock the car when you do not use it.
不用车的时候，锁车是有必要的。
It 's necessary to find the witness.
有必要找到目击者。
It "s absolutely necessary that learning English becomes a habit."
将学习英语变成一个习惯是绝对有必要的。
It 's necessary for us to find it out.
对我们来说弄清楚这件事是很有必要的。
But he says it was necessary to prevent the U. S. financial system from collapsing.
但是他说，防止美国的金融体系崩溃是必须的。
But he says it was necessary to prevent the U. S. financial system from collapsing.
但是他说，防止美国的金融体系崩溃是必须的。
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