Backo巴茨科backn.后面；背脊；靠背；后背；后卫vt.支持；后退adv.向后地adj.向后的；后面的；偏远的；过时的；积欠的backdriftn.后退偏航back play空程back prop后支柱,后撑backstand后座,张紧座backcrawln.仰泳; 仰泳比赛back face后端面,背面,背割面back gray印花衬布back stay后拉缆,固定中心架back bone分水岭,脊柱backcheckv.回本方守区内阻截

1. The small ball dropped back to the floor.
   小球又落回到地板上。
2. Louise lost no time in returning to Cincinnati.
   路易丝没有耽搁，马上回到辛辛那提。