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词组 on guard(on one's guard)
释义 guard , on ~: on one's ~— 427
on guard 这个短语作“站岗”讲, on one's guard 这个短语作“警惕”讲,混淆不得。
例如:
A sentry was on guard at each of the gates. 每个大门口都有哨兵在站岗。
we shall have to be on our guard against making mistakes in the future. 我们应该提高警惕免得将来再犯错误。
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更新时间:2025/6/7 5:44:41