cycled

• He cycled all day long, till he was fagged out .
  他骑了一整天自行车，直到精疲力竭方才罢休。
• I'm very keen on cycling .
  我很爱好骑自行车。
• Man's effect on the sulfur cycle has been considerable .
  人类对硫循环的影响一直是很可观的。
• The disease recurs in epidemic cycles at two-to three-year intervals .
  本病流行周期为2-3年。
• Business cycles are recurring cycles of economic events .
  商业周期是经济活动重复发生的周期。
• A graph is bipartite if it does not contain an odd cycle .
  一个图是二部图，如果它不包含奇圈。
• Booms run in cycle .
  景气状况周期性地出现。
• The life cycle of maize is that of a typical angiosperm .
  玉米的生活史是被子植物中比较典型的。
• It is doubtful whether they will ever cycle across the atlantic .
  是否能飞越大西洋则尚属可疑。
• Feliks cycled through the arch and into trafalgar square .
  弗利克斯骑车过了牌楼来到特拉格广场。