formidability adj.强大的；可怕的；难对付的formication (n.) formicary (n.) formicant (adj.) formic (adj.) formerly (adv.) former (adj.) formative (adj.) formation (n.) format (n.) formally (adv.) formalize (v.) formality (n.) formalistic (adj.) formalism (n.) formaldehyde (n.) formal (adj.) formal adj. 正式的；拘谨的；有条理的 n. 正式的社交活动；夜礼服 n. (Formal)人名；(法)福马尔formable (adj.) form (n.)