I laid the coil spring on the side of his head and he stumbled forward.
我把螺旋弹簧放在他脑袋的一侧, 他跌跌撞撞地向前走去。
剑桥雅思官方指南
B.A small spring in the centre causes the toy inside to bounce out with a twisting movement. The spring coils back down easily enough so that the toy can fit back into the box.