lame under the hat

例句：

1. 1. The oldman was lame in his left leg.
   老人左腿跛。
2. 2. The dog is lame after being hit by a car.
   这只狗在被车撞后变得跛了。
3. 3. The scientist discovered that the lameness was caused by a genetic defect.
   科学家发现跛行是由遗传缺陷引起的。