BigBook-Book 1 Unit 18 (K)

14 카드 | CompassPublishing

세트공유

bicycle

자전거
Do you own a bicycle?

chain

사슬
A pulley is a wheel that moves by pulling a chain.

compound

복합의
But did you know your bicycle is a compound machine?

easy

쉬운
Simple machines are tools used to make work easier.

또는
A compound machine is made up of two or more simple machines.

pedal

페달
The pedals of your bicycle are part of a pulley system.

play

놀이
Bicycles are used for work and play.

pulley

도르래
A third simple machine is a pulley.

simple

간단한
A compound machine is made up of two or more simple machines.

system

체제
The pedals of your bicycle are part of a pulley system.

third

세 번째의
A third simple machine is a pulley.

turn

돌다
An axle holds the wheel and allows the wheel to turn.

wheel

바퀴
Another simple machine is a wheel and axle.

work

일
Bicycles are used for work and play.