![vigilance造句怎么写]( "vigilance造句怎么写")
- Butvigilanceisneeded.Ourvigilanceneverlanguished.Butthefindingsemphasizetheneedforcontinuedvigilance.Constantvigilanceisnecessaryinordertoavoidaccidents.Wemustmaintainkeenvigilanceatalltime.ThegreatAmericanPresidentThomasJeffersononceobservedthatthep...
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