a person who makes a telephone call

打电话的人

a visitor who comes to see someone, often briefly

来访者；上门拜访的人

the person announcing numbers to players in bingo

在宾果游戏中报号码的人

in computing, a routine or function that invokes another

计算中，调用另一程序单元的例程或函数

a whistle or device used to call foxes

用于召唤狐狸的哨子或装置

the person who calls figures for square or line dancing

在方块舞或排舞中报口令指挥的人