Scammers often target gullible customers with fake emails claiming their bank accounts are locked.

詐騙者常以聲稱銀行帳戶被鎖定的假電子郵件，鎖定容易上當的客戶。

The training session warned new hires not to be gullible about unsolicited vendor offers.

訓練課程提醒新進員工，面對主動上門的廠商優惠時不要輕易上當。

Gullible travelers sometimes pay double when they book tours from unlicensed street agents.

容易上當的旅客有時向無照的街頭業者訂行程，結果付了兩倍的錢。