(n.) The process of repairing broken feathers or a deficient
wing.
整理:薇尔玛
双语例句
At first five lines were used to carry these impulses to the receiving instrument, where there were five iron pins impinging on the drum. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
The sound-waves impinging upon the distant transmitter varied the resistance of the carbon button therein, thus causing corresponding variations in the strength of the battery current. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.