英语词汇to require constant vigilance怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	to require constant vigilance
释义	to require constant vigilance需要持续保持警惕 Drugs are a problem that requires constant vigilance.毒品是一个需要长期保持警惕的问题。 See vigilance
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