Giải nghĩa:
A moving staircase that you stand on to go up or down to different levels in a building.
Ví dụ:
He was too tired to take the stairs, so he took the escalator instead.
Cách sử dụng
An escalator is a moving set of stairs that helps people move up or down between different levels in big buildings like shopping malls, airports or train stations. You can stand on the steps of an escalator and let it carry you up or down without having to walk. Escalators make it easier and faster to move around inside big buildings with many floors.
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