They press the up button at the elevators and say hello to guests when the elevator door opens.

他们在电梯门开启的时候，按下按钮，并向客人问好。

youdao

They press the up button at the elevators and say hello to guests when the elevator door opens.

他们在电梯门开启的时候，按下按钮，并向客人问好。

youdao