Pollution can aggravate asthma.
污染会使气喘加重。
Pollution can harm marine life.
污染会危及海洋生物。
We need more laws to stop pollution.
我们需要制定更多法律来防止污染。
Pollution is threatening marine life.
污染正危及海洋生物。
We are taking steps to prevent pollution.
我们正在采取措施防止污染。
Steps are to be taken to abate pollution.
应该采取措施减少污染。
Pollution is still very much a live issue.
污染仍然是目前非常让人关注的问题。
Cars cause pollution, both smog and acid rain.
汽车引起污染，既有烟雾又有酸雨。
The level of pollution in the river was falling.
该河流受污染的程度其时正在降低。
The EU has set strict limits on pollution levels.
欧盟对污染程度订下了严格的限制。
Air pollution has risen above an acceptable level.
空气污染已经超标。
The EU has set strict limits on levels of pollution.
欧盟对污染程度作了严格的限制。
