A fixed-gear bike is a bicycle whose pedals rotate at all times, even when coasting.
固定齿轮自行车是一种需要人一直不停地踩的自行车，即使在滑行时也要一直踩。
2
So if you see a bearded intruder on a fixed-gear bike in your neighbourhood, welcome him.
所以如果你在你住的社区看到一位骑着自行车、一脸络腮胡子的不速之客的话，就欢迎他吧。
3
With that gorgeous-looking, chunky chainring and the possibility of candy-colored belts, combined with an almost silent operation, make me want to try one out on my fixed-gear bike.