bi‧cy‧cle 1 W3 / baɪsɪk ə l / 名词 [可数名词]

a vehicle with two wheels that you ride by pushing its  pedal s  with your feet 同义词 bike :  

Can James ride a bicycle yet? → exercise bike

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In everyday English, people usually say bike rather than bicycle :

They go everywhere by bike .

COLLOCATIONS

动词

ride a bicycle Riding a bicycle is very good exercise.

get on/off a bicycle I got on my bicycle and cycled over to Rob’s house.

push/wheel a bicycle (= walk beside it pushing it ) She was wheeling her bicycle and talking to some friends.

bicycle + NOUN

a bicycle shop ( also bicycle store American English ) His dream was to own a bicycle shop.

a bicycle ride They went for a 50 km bicycle ride.

a bicycle wheel/tyre My front bicycle tyre is flat.

a bicycle pump (= for putting more air in a tyre ) Where’s the bicycle pump?

a bicycle helmet It’s safer to wear a bicycle helmet.

a bicycle shed (= place for keeping bicycles in ) He built a bicycle shed in the back yard.