Before operating an instrument, make sure the linecord is connected to a properly grounded power receptacle.
在操作仪器之前，请确保电源线被连接到具有适当接地的电源插座。
2
Further down the line here, if we looked in the adult brain or spinal cord and other regions, we'll find committed progenitor cells.
沿着这条线再往后，如果我们看看成人的大脑或者脊髓和其他部位，我们就能找到定向祖细胞。
3
With his one good eye he surveyed the line of trees about twenty yards away while his parrot, Peggy, who was perched upon his shoulder pecked at the cord which held the patch over his other eye.