词典
例句
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简体中文
keep off
keep on
keep on one's toe
keep on one's toes
keep on someone
keep on the alert
keep one temper
keep one's balance
keep one's chin up
keep one's cool
keep one's distance
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keep on the alert
➞
keep on the alert
Definitions
[1] Alarmbereit sein, alarmiert sein
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简体中文
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keep on the alert