基本解释[躰育]背水平懸垂英汉例句雙語例句But the tail should not be constantly carried above the level of the back or hang limp.但是尾巴的高度不應該經常超過背的水平線或者垂掛時松弱無力。back level hang更多例句专业释义躰育背水平懸垂