when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，
新概念英语第四册
Lesson 35 Space odyssey
📚 句中词汇解析
从本句中提取的重要词汇
adj. 重要的;有意义的;有重大意义的;值得注意的;
n. 有意义的事物;象征，标志;
💡 sign记号，信号+ific产生…的+ant形容词后缀→有意义的
"There are no significant differences between the education systems of the two countries."
这两国的教育制度没有大的差别。
近义：indicative, key, meaningful, momentous, representative, significative
反义：irregular, nonconforming, atypical, uncharacteristic, uncommon, untypical
n. 数字;数量;号码;编号;
v. 标号;总计;把…算作;
💡 numer, number 表示”数字”;”计算”,”估算”
"The number of people employed in agriculture has fallen in the last decade."
过去十年，农业从业人数已经下降。
近义：numerate, reckon, recount, sum, tally, cipher
反义：remove, subduct, take, withdraw, deduct
n. 人，人类;居民;人民;种族;
vt. 居住于，布满;使住满人，在…殖民;把动物放养在;
💡 popul, publ 表”人民”
"I can't abide people with no sense of humour."
我讨厌和没有幽默感的人打交道。
近义：populate, settle, crowd, individuals, persons, folks
反义：person, single, subject, dude, bleeder, bloke
adj. 活（着）的;现存的;在使用中的;逼真的;
n. 生计;生活方式;生存之道;
v. 活( live的现在分词);居住;以…为生;（按照规矩）管理生活;
💡 liv生活+ing名词后缀 → 生活，生计
"The prisoners were living in appalling conditions."
囚犯的居住条件极为恶劣。
近义：livelihood, sustenance, live, quickened, surviving, alive
反义：inert, insentient, lifeless, spiritless, unanimated, unfeeling
adv. 永久地，长期不变地;
"The ship is now permanently moored on the Thames in London."
该船现在永久地停泊在伦敦泰晤士河边.
近义：incessantly, perpetually, steadily, unceasingly, ceaselessly, constantly
反义：occasionally, rarely, seldom, sporadically