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be on guard

更新日期:2026-08-14

词语 be on guard
释义

be on guard
释义
小心谨慎:避免被欺骗或陷入危险的情况。
例句
1·At the outset, it seemed necessary to be on guard against the other two.
一开始,似乎有必要提防另外两个。
2·Two soldiers must be on guard all night.
两名战士必须通宵警戒。
3·I must protect myself and be on guard .
我必须保护自己、保持警惕。

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