一只老鼠从黑暗的洞口跑出―― A mouse ran out from the dark orifice of the cave.在杂树林里有只老鼠。

――There is a mouse in that copse.黄鼠狼主要以老鼠和兔子为食。

――Weasel lives mainly on rats and rabbits.那有一个大批老鼠出没的仓库―― There is a warehouse infested by rats.老鼠使我害怕―― Rats terrify me.我猜想厨房里有老鼠――I guess there are mice in the kitchen.猫在戏弄那只活老鼠――The cat is playing with a live mouse.咒语将青蛙和老鼠又变回成了人――The magic spell changed the frogs and rats back into men.