2. 外语
  3. ____________(环境一旦造成破坏), it takes many years for the system to recover.

____________(环境一旦造成破坏), it takes many years for the system to recover.

admin2012-09-19  55
问题 ____________(环境一旦造成破坏), it takes many years for the system to recover.
选项
答案Once environmental damage is done
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大学英语四级

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