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关注：1
2013-05-23 12:21
求翻译：Pollution is caused either by man's release of completely new and often artificial substances into the environment,or by releasing greatly increased amounts of a natural substance,such as oil from oil tankers into the sea.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
Pollution is caused either by man's release of completely new and often artificial substances into the environment,or by releasing greatly increased amounts of a natural substance,such as oil from oil tankers into the sea.
问题补充： |
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2013-05-23 12:21:38
正在翻译，请等待...
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2013-05-23 12:23:18
正在翻译，请等待...
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2013-05-23 12:24:58
Pollution is caused either by man's release of completely new and often artificial substances into the environment, or by releasing greatly increased amounts of a natural substance, such as oil from oil tankers into the sea.
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2013-05-23 12:26:38
Pollution is caused either by man's release of completely new and often artificial substances into the environment,or by releasing greatly increased amounts of a natural substance,such as oil from oil tankers into the sea.
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2013-05-23 12:28:18
正在翻译，请等待...
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