n.拨链器， 变速器 (自行车换挡装置)

I need to adjust the derailleur on my bike because it's not shifting gears smoothly.
我需要调整我的自行车变速器，因为它换档不顺畅。
The derailleur hanger is bent, which could be causing the shifting problems.
变速器挂架弯曲了，这可能是导致换档问题的原因。
Make sure the derailleur is properly aligned with the cassette for optimal performance.
确保变速器与飞轮正确对齐，以获得最佳性能。
The derailleur cable snapped during my ride, leaving me stranded.
在我骑行过程中，变速器拉线突然断裂，让我被困在了路上。
After installing the new derailleur, I had to re-index the shifting system.
安装新的变速器后，我不得不重新校准换档系统。
The rear derailleur on my mountain bike has 11 speeds.
我的山地车后变速器有11个档位。
A derailleur guard can protect the mechanism from damage in rough terrain.
在崎岖地形中，变速器保护装置可以防止机构受损。
I prefer a mechanical derailleur over an electronic one because it's easier to maintain.
我更喜欢机械变速器而不是电子变速器，因为机械变速器更容易维护。
The derailleur pulley wheels should be cleaned and lubricated regularly.
变速器导轮应定期清洁和润滑。
My friend accidentally hit a rock, causing his derailleur to get damaged.
我的朋友不小心撞到了一块石头，导致他的变速器损坏了。