We need more laws to stop pollution.
我们需要制定更多法律来防止污染。
What can you do to stop pollution?
停止污染你能做点什么？
Much has been done to stop pollution.
已经做许多工作来终止污染。
We must take action to stop pollution.
我们必须采取措施阻止污染。
I think it important to stop pollution.
我认为制止污染很重要。
We must take measures to stop pollution.
我们必须采取措施制止污染。
Something must be done to stop pollution.
必须采取措施来停止污染。
Measures must be taken to stop pollution.
必须采取措施制止污染。
We should work together to stop pollution.
我们应该一起努力制止污染。
Measures should be taken to stop pollution.
该采取措施制止污染了。
Man is trying to find ways to stop pollution.
人类正努力寻找制止污染的方法。
What measures shall we take to stop pollution?
我们采取什么措施来停止污染？
We should take many measures to stop pollution.
我们应该采取许多措施去停止污染。
It's time that we did something to stop pollution.
到了我们采取行动制止污染的时候了。
It is time that we did something to stop pollution.
该我们做些什么制止污染的时候了。
Some effective measures must be taken to stop pollution.
我们必须采取有效措施来治理污染。
Stop pollution and save water, otherwise, we cannot survive on the earth.
停止污染并节约用水，否则，我们无法在地球上生存。
Stop pollution and save water, otherwise, we cannot survive on the earth.
请停止污染并节约用水，否则，我们不能再在地球上生存。
The species we introduce, unlike the pollution we produce, don't stop when we do.
我们引入的物种，可不同于我们产生的污染，我们停止行动的时候这些物种不会停止进入。
So something must be done to stop the pollution.
要阻止污染，有些事情必须被做。
We must do something to stop the pollution, make our city more beautiful.
我们必须做一些事来制止污染，使我们的城市更加美丽。
Something must be done to stop the pollution in our city.
必须要采取措施来阻止我们城市的污染。
We should take a series of measures to stop air pollution.
我们应该采取一系列的措施制止空气污染。
We shall take a series of measures to stop air pollution.
我们将采取一系列措施制止空气污染。
Something must be done to stop the pollution.
必须采取措施来阻止污染。
Something must be done to stop the pollution.
必须采取某种措施来制止污染。
Something must be done to stop the pollution.
必须采取某种措施来制止污染。
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