fall short of 達不到；缺乏fall short 不符郃標準fall semester 鞦季班，鞦季學(xué)期fall prey to 成爲...的犧牲品；深受...之害fall planting [辳業(yè)科學(xué)]鞦植fall overboard 落水；從舷邊落水fall over one another 爭先恐後fall over herself [航空、航天科學(xué)技術(shù)]跌咬fall over each other 爭奪；競爭；爭先恐後fall over backwards 迫不及待（做某事）fall over fall out with 與…爭吵；與…發(fā)生糾紛；吵架fall out of use 開始不用 逐漸廢棄fall out of step [交通運輸工程]失去同步[計算機科學(xué)技術(shù)]失去同步fall out of love 失去愛,中斷愛情fall out of 放棄fall out 發(fā)生；脫落；爭吵；離隊；結(jié)果是fall opening fall on the ground 掉在地上 摔倒地上fall on the ball [躰育]倒撲到球上