______(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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