不大 1.(不经常) not often; seldom; rarely; hardly; scarcely 他不大看电影。 he seldom goes to the cinema. 他最近不大来。 he hasn't been coming around much recently. 这孩子不大讲话。 the child does not talk very much.2.(程度不深) not very; not too; not quite 不大可能的事 something improbable; 不大清楚 not too clear; 不大妥当 not quite proper; 不大好 not very good; 我不大想到那里去。 i am not very keen on going there
熟练 skilled; practised; proficient 熟练工人 skilled [experienced] worker; hot-short; 技术熟练 skilled in technique; 一种熟练的技能 a practised skill; 做某事很熟练 be proficient in doing sth.; 他用筷子不大熟练。 he's not very skilful with his chopsticks [at using chopsticks.]