Facts are stubborn things. 【谚】事实勿容争辩。
Facts do not cease to exist just because they are ignored. ( ~~~Aldous Huxley )
Fail to see the wood for the trees (=not see the wood for the trees) 见树不见林;顾大不顾小。
Faint heart never won fair lady. 不入虎穴焉得虎子。胆怯者永远得不到美人的芳心。果敢能成事。
fair without and foul within 外表美而内心丑陋;绣花枕头
Familiarity breed contempt. 过份熟稔易滋侮蔑;近庙欺神。
Familiarity breeds contempt. 虎生犹可近,人熟不堪亲。
Feed a cold and starve a fever.【谚】伤风应多吃,发烧应少食。
Fine feathers make fine birds. 佛要金装。人要衣装。
Fire and water may be good servants, but bad masters. 【谚】水火是忠仆,用之不慎却成祸主。
First Come, first served. 先到是君,後到是臣 (捷足先登)。
First come first served. 先来先得;捷足先登。
Fools are wise [It is easy to be wise] after the event. 【谚】事後诸葛亮,傻子也能当。
Fools rush in where angels fear to tread. 自不量力。【谚】愚者冲进天使所怕踏足之地;盲人不怕蛇,无知的人反而爱逞能。
Forewarned is forearmed. 先知先戒备。
Fortune favors the brave (bold). 天助勇者。