301. in fashion(=stylish, most modern)时兴,流行

302. after the fashion (of) 依照…

303. find fault with(=complain about; criticize)找毛病，对…吹毛求疵

304. at fault (=in the wrong, blamable)有错

305. in favour of 赞成

306. be in favour with 受宠, 受偏爱;

out of favour with 失宠, 不受宠

307. in one’s favour(=to one’s advantage)对.有利

308. (be) favourable to(=advantageous)有利的

309. fear for (=be afraid for the safety of sb. or sth.) 为…担心

310. for fear of (=in case of; because of anxiety about) 以防, 由于怕

311. in fear of (=afraid for the safety of) 担心

312. feed (sb.) on sth. 靠吃…, 用…喂养

313. be fed up with(=be unhappy, tired about sth. dull) 厌烦, 腻了

314. feel like (=have a desire for) 想要

315. fill in 填写

316. fill out ( =fill in )填写

317. set the world on fire=set the flames on fire(=do sth. remarkable)有突出成就

318. play with fire (=take great risks)干冒险事

319. set sth. on fire(=set fire to sth.)使..着火,放火

320. at first sight(=when first seen)乍一看,一见

321. for the first time 第一次 (作状语)

322. in the first place 首先, 第一

323. fit into 刚好放入

324. fit in with ( = suit , fall into agreement) 合适, 相配, 一致

325. (be) fit for (=right and suitable for) 适合

326. focus on (=concentrate on) 集中在…上

focus sth. on 把…集中在…上

327. be fond of 喜欢

328. (be) in force 有效 , 实施

329. go into force 开始生效

330. by force 靠武力, 强行