There is no denying that piracy is an extremely serious problem.
无可否认，盗版是一个极其严重的问题。
There is no denying the fact that air pollution is an extremely serious problem and we should take strong measures to deal with it.
不可否认，空气污染是一个极其严重的问题，我们应该采取有力措施来解决它。
There is no denying the fact that air pollution is an extremely serious problem: the city authorities should take strong measures to deal with it.
不可否认，空气污染是一个极其严重的问题：市政部门应该采取有力措施来解决。
This only caused a real problem once (under extremely specific circumstances, which are described in the third article in this series), but it was still a serious mistake.
虽然这只有一次造成了真正的问题(在本系列第三篇要介绍的极其特殊的情况下)，但这仍然是一个严重的过失。
If a dog becomes extremely lethargic all of a sudden, it's a sign of a possible serious and systemic problem.
如果狗狗突然之间变得非常迟钝，这也许是一个严重系统性问题的征兆。
Among adolescent girls, dieting, which is extremely common, may be contributing to the serious problem our nation has with teenage tobacco use, 'according to study author Dr.
研究人员认为，节食在十多岁的少女中非常普遍，这也许是美国青少年日益严重的吸烟问题的原因。
Abstract: at present, the problem of energy shortage, environment pollution, global warming is increasingly serious, so low-carbon vehicle technology innovation is extremely urgent.
摘要当前，能源紧张、环境污染、全球气候变暖等问题日益严峻，低碳汽车技术创新迫在眉睫。
Abstract: at present, the problem of energy shortage, environment pollution, global warming is increasingly serious, so low-carbon vehicle technology innovation is extremely urgent.
摘要当前，能源紧张、环境污染、全球气候变暖等问题日益严峻，低碳汽车技术创新迫在眉睫。
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