书籍 Solutions - 初中级 - 单元 5 - 5D

a small area or part of a machine or electronic device, which when pressed starts working

the thing we move to enter, exit, or access a place such as a vehicle, building, room, etc.

all the rooms of a building that are on the same level

a box-like device that goes up and down and is used to get to the different floors of a building

to move something like a window or door into a position that people or things cannot pass through

to function in a specific way

to move something like a window or door into a position that people, things, etc. can pass through or use

to apply force to something, typically with a hand or finger, in order to operate or activate a mechanical or electronic device