电梯坏了，只能走楼梯上去。

Diàntī huài le, zhǐnéng zǒu lóutī shàngqù.

The elevator is broken, so we can only go up by the stairs.

爬楼梯比坐电梯更健康。

Pá lóutī bǐ zuò diàntī gèng jiànkāng.

Climbing the stairs is healthier than taking the elevator.