2. 外语
  3. ______(当说到能源安全), our policy is not directed against any single country.

______(当说到能源安全), our policy is not directed against any single country.

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问题  ______(当说到能源安全), our policy is not directed against any single country.
选项
答案When it comes to energy security
解析 when it comes to sth./doing sth.意思是“当说到……；当提到……；当涉及到……”，是很地道的固定表达。
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大学英语四级

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