elevator canvas

例句：

1. 1.The elevator was out of order and we had to wait for the next one.
   电梯出了故障，我们不得不等待下一班。
2. 2.The escalator is moving slowly because of the heavy snow.
   由于大雪，自动扶梯移动得很慢。
3. 3. The elevator stopped at the top floor and I had to walk downstairs.
   电梯停在顶楼，我不得不走楼梯下去。