when a significant number of people are living permanently in space.
如果有相當數量的人永久性地住在太空，
新概念英語第四冊
Lesson 35 Space odyssey
?? 句中詞匯解析
從本句中提取的重要詞匯
adj. 重要的;有意義的;有重大意義的;值得注意的;
n. 有意義的事物;象征，標志;
?? sign記號，信號+ific產生…的+ant形容詞后綴→有意義的
"There are no significant differences between the education systems of the two countries."
這兩國的教育制度沒有大的差別。
近義：indicative, key, meaningful, momentous, representative, significative
反義：irregular, nonconforming, atypical, uncharacteristic, uncommon, untypical
n. 數字;數量;號碼;編號;
v. 標號;總計;把…算作;
?? numer, number 表示”數字”;”計算”,”估算”
"The number of people employed in agriculture has fallen in the last decade."
過去十年，農業從業人數已經下降。
近義：numerate, reckon, recount, sum, tally, cipher
反義：remove, subduct, take, withdraw, deduct
n. 人，人類;居民;人民;種族;
vt. 居住于，布滿;使住滿人，在…殖民;把動物放養在;
?? popul, publ 表”人民”
"I can't abide people with no sense of humour."
我討厭和沒有幽默感的人打交道。
近義：populate, settle, crowd, individuals, persons, folks
反義：person, single, subject, dude, bleeder, bloke
adj. 活（著）的;現存的;在使用中的;逼真的;
n. 生計;生活方式;生存之道;
v. 活( live的現在分詞);居住;以…為生;（按照規矩）管理生活;
?? liv生活+ing名詞后綴 → 生活，生計
"The prisoners were living in appalling conditions."
囚犯的居住條件極為惡劣。
近義：livelihood, sustenance, live, quickened, surviving, alive
反義：inert, insentient, lifeless, spiritless, unanimated, unfeeling
adv. 永久地，長期不變地;
"The ship is now permanently moored on the Thames in London."
該船現在永久地停泊在倫敦泰晤士河邊.
近義：incessantly, perpetually, steadily, unceasingly, ceaselessly, constantly
反義：occasionally, rarely, seldom, sporadically