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Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
室外自然清新的空气。
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室外自然清新的空气。；新鲜空气；[化] 新鲜空气
The natural, clean air from outside, as opposed to the relatively stuffy air inside.
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室外自然清新的空气。
The natural, clean air from outside, as opposed to the relatively stuffy air inside.
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Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from ECDICT, WIKTIONARY.