the sport or activity of riding a bicycle 骑自行车运动（或活动） 
to go cycling 去骑自行车 Cycling is Europe's second most popular sport. 骑自行车是欧洲第二流行的体育运动。 🔊🔊 cycling shorts 自行车运动短裤
Oxford Collocations DictionaryCycling is used before these nouns:- marathon
- proficiency
- shorts
- …