电梯操作员确保乘客安全到达目的地。

The elevator ___operator ensures passengers reach their destination safely.

这家旅游运营商提供前往东南亚的包机服务。

The travel ___operator offers charter flights to Southeast Asia.

在数学表达式中，加号是最基本的运算符。

In mathematical expressions, the plus sign is the most basic ___operator.

接线员帮我转接到了技术支持部门。

The ___operator transferred my call to the technical support department.