worn-out

adj.

不能再用（或穿）的，磨破的，穿旧的；破旧；劳瘁；

1. The worn breaks require replacement.
   磨损的刹车需要替换。
2. Noises may develop in a worn engine.
   磨损的引擎里可能会发出各种噪声。
3. Your composition will read better if you cross out these wear-out figures of speech.
   如果去掉这些陈腐的比喻，你的作文读起来就要好一些。

The "worn-out athlete": A clinical approach to chronic fatigue in athletes
Squeeze-film lubrication of the human ankle joint with synovial fluid filtrated by articular cartilage with the superficial zone wor...
Open end wrench for turning normal and worn-out bolts and nuts of different specifications
Not-Last Words: Worn-Out Dichotomies in the Sociology of Science (Reply)
A theoretical and experimental approach to reconstructing the transverse profile of worn-out rails
Scanning electron microscopic studies of worn-out leaded aluminium-silicon alloy surfaces
An aggressive worn-out flash block management scheme to alleviate SSD performance degradation
Mono and Stereoscopic Image Analysis for Detecting the Transverse Profile of Worn-Out Rails
Tramway Track: A New Approach for Measuring the Transverse Profile of Worn-Out Rails ☆
Worn-out oxide MOSFET characteristics: Role of gate current and device parameters on a current mirror