Noun:

1. an acrobatic feat in which the trunk is bent backward from a standing position until the hands touch the floor

backlot外景场地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backstay anchor拉霜定back order memo延期交货通知单,欠交订货通知单back passageway巷路/避弄back slide step背向滑步back lash error隙动差backshaft drive后轴传动backing storage备用存储器,辅助存储器backplane crack底板裂缝backstage talks秘密谈话back-off time传输延时