fallow [5fAlEu] adj.休耕的;闲置的(plowed but sowed; uncultivated)
(反)fallow ◆ in use 闲置的 ◆ 使用中的
fail-safe [feil-seif] n.自动防故障装置
(类)fail-safe·malfunction 自动防故障装置·故障(阻止关系)
falsehood [5fC:lshJd] n.谎言;虚假
(类)falsehood·calumniate=evidence·corroborate 用谎言诽谤=用证据证实
falter [5fC:ltE(r)] n.v. 蹒跚;颤抖;动摇(hesitate)支吾说话
(类)falter·act=stammer·speak 蹒跚是动作不灵活=结巴是说话不灵活
(同)lurch,stagger,stumble,wobble,hesitate,vacillate,waver, wiggle-waggle