F 开头单词
falling tide [海洋] 落潮；[海洋] 退潮
falling stile 垂落門梃
falling star 流星
falling snow 飄降著的雪
falling sickness n. 癲癇；（家畜的）癲癇發作
falling rock formation [教育學]塌落巖層
falling rate drying period [物理學]下降率乾燥期
falling over 遠彈著；極度倒伏
falling out of feather [辳業科學]羽毛脫落
falling out 舷緣外傾
falling off 減少；降落
falling market 市場價格下跌
falling liquid film [土木建築工程]降膜
falling leaf 落葉式飛行，落葉式失速墜降
falling in love 墜入情網
falling in 舷緣內傾；陷落；塌陷
falling head permeameter [經濟學]降水頭滲透率儀