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301. in fashion(=stylish, most modern)ʱÐË,Á÷ÐÐ
302. after the fashion (of) ÒÀÕÕ¡­
303. find fault with(=complain about; criticize)ÕÒ벡£¬¶Ô¡­´µÃ«Çó´Ã
304. at fault (=in the wrong, blamable)Óдí
305. in favour of  ÔÞ³É
306. be in favour with Êܳè, ÊÜÆ«°®;
    out of favour with ʧ³è, ²»Êܳè
307. in one¡¯s favour(=to one¡¯s advantage)¶Ô.ÓÐÀû
308. (be) favourable to(=advantageous)ÓÐÀûµÄ
309. fear for (=be afraid for the safety of sb. or sth.) Ϊ¡­µ£ÐÄ
310. for fear of (=in case of; because of anxiety about) ÒÔ·À, ÓÉÓÚÅÂ
311. in fear of (=afraid for the safety of) µ£ÐÄ
312. feed (sb.) on sth. ¿¿³Ô¡­, Óá­Î¹Ñø313. be fed up with(=be unhappy, tired about sth. dull) Ñá·³, ÄåÁË
314. feel like (=have a desire for) ÏëÒª
315. fill in  Ìîд
316. fill out ( =fill in )Ìîд
317. set the world on fire=set the flames on fire(=do sth. remarkable)ÓÐÍ»³ö³É¾Í
318. play with fire (=take great risks)¸ÉðÏÕÊÂ
319. set sth. on fire(=set fire to sth.)ʹ..×Å»ð,·Å»ð
320. at first sight(=when first seen)Õ§Ò»¿´,Ò»¼û
321. for the first time µÚÒ»´Î (×÷×´Óï)
322. in the first place Ê×ÏÈ, µÚÒ»
323. fit into ¸ÕºÃ·ÅÈë
324. fit in with ( = suit , fall into agreement)    ºÏÊÊ, ÏàÅä, Ò»ÖÂ
325. (be) fit for (=right and suitable for) ÊʺÏ
326. focus on (=concentrate on) ¼¯ÖÐÔÚ¡­ÉÏ
    focus sth. on  °Ñ¡­¼¯ÖÐÔÚ¡­ÉÏ
327. be fond of  ϲ»¶
328. (be) in force ÓÐЧ , ʵʩ