他给火车撞伤，失去了一只脚。He lost a foot when he was struck by a train.那辆失控的车猛冲到一条长椅上，撞伤了一对老夫妇。The runaway car careered into a bench, hitting an elderly couple.我的头撞在门柱上,撞伤了.I knocked my head against the doorpost and hurt it....
肺细胞约每周新老更替一次。Lung cells die and are replaced about once a week.昼夜更替.Day and night alternate.从事高等教育的人员新老更替极其缓慢。There has been very little renewal of personnel in higher education....
很少有鸟类会在镜头面前梳理自己的羽毛。Rare birds preen themselves right in front of your camera.燕雀大约在12个星期大小的时候开始换羽毛。Finches start to moult at around twelve weeks of age.拔羽毛必须干净利落。The feather must be removed with a straight, firm pull....