seldom adv. 不常;很少;難得…。 He seldom, if ever, goes out.= He seldom or never goes out. 他很少出門。 It is seldom that a man lives to be a hundred years old. 人生百歲古來稀。 not seldom 往往;時常。 seldom or never=very seldom 很少;簡直不。 adj. 不常的;稀少的。
twice adv. 兩次;兩倍。 It is twice as good. 加倍地好。 twice as much 兩倍(的份量)。 He is twice the man he was. = He has twice the strength he had. = He is twice as strong as he was. 他比從前加倍強壯了。 T- two is four. 二二得四。 in twice 〔口語〕分兩次。 once or twice 一兩次。 think twice 重新考慮,仔細考慮 (do not think twice about 不再考慮,斷然…;不再想起,忘掉,忽視)。 twice or thrice 兩三次。 -r 再度做某事的人,做某事兩次的人〔如做兩次禮拜〕;兼做兩件事的人〔如排字兼印刷工人〕;雙倍的結(jié)果;〔主英〕騙子。
opportunity n. 機會,好機會;〔罕用語〕湊巧,方便。 a good [favourable] opportunity 好機會,良機。 afford [find, get, give, make, miss, seize, take] an [the] opportunity 給[找著,得著,給,造,失去,抓住,利用]機會 (I take every opportunity of speaking English. 我利用一切機會講英語)。 at the earliest [at the first, on the first] opportunity 一有機會。 equality of opportunity 機會均等。 have an [no, little] opportunity for doing [to do] sth. 有[沒有]做某事的機會。 make the most of an opportunity 盡力利用機會。