adj.未受协助的；独立的
That comet is invisible to the unaided eye. 那颗彗星只用肉眼是看不到的。
Four months to the day, Ralph finally stood unaided. 到今天就四个月了，拉尔夫终于独立地站立起来。
The baby cannot sit unaided and she has to be propped up on pillows. 那婴儿还不会坐
