關於vigilance的百科

• vigilance造句怎麼寫

• Butvigilanceisneeded.Ourvigilanceneverlanguished.Butthefindingsemphasizetheneedforcontinuedvigilance.Constantvigilanceisnecessaryinordertoavoidaccidents.Wemustmaintainkeenvigilanceatalltime.ThegreatAmericanPresidentThomasJeffersononceobservedthatthep...
• 2017-05-0532881