adv. 一次,一趟;一倍;曾經(jīng);一旦;
conj. 一旦…就…;一經(jīng);
n. 一次,一回;
?? on=one一+ce次 → 一次
"Once in the bloodstream, the bacteria adhere to the surface of the red cells."
細(xì)菌一進(jìn)入血液里,就附著在紅細(xì)胞表面上。
近義:heretofore, occasionally, onetime, previously, sometimes, thereinbefore
n. 一生,壽命;有生之年;存在期,有效期;
na. 終生;終身保障;[核]壽命;
?? life生命+time時(shí)間→ n.一生,終身
"His diary was not published during his lifetime."
他的日記在他生前未曾發(fā)表過(guò)。
近義:time, age, epoch, era, generation, lifelong
n. 機(jī)會(huì),機(jī)遇;概率,可能性;偶然,運(yùn)氣;
v. 偶然發(fā)生;冒險(xiǎn);碰巧;偶然被發(fā)現(xiàn);
adj. 意外的;偶然的;碰巧的;
?? 碰巧有 機(jī)會(huì)闡(chan)述我的計(jì)策(ce)
"I would do it if I had the chance."
如果我有機(jī)會(huì)的話(huà),我也會(huì)那么做。
近義:hazard, imperil, jeopardise, jeopardize, risk, stake
反義:assurance, assuredness, obviousness, palpability, patency, positiveness