Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.
历史学家迄今认为日历是随农业的问世而出现的，因为当时人们面临着了解四季的实际需要，
新概念英语第三册
Lesson 38 The first calender
📚 句中词汇解析
从本句中提取的重要词汇
n. 农业;农耕;农业生产;农学;
💡 agri田地+cult耕种+ure表名词→ 农业
"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：husbandry, agronomy, farming
vt.& vi. 懂，理解;
vt. 了解;默认;听说;领会;
💡 under(under)+stand→懂；了解；通晓；认为
"That's just an approximation, you understand."
你知道那仅仅是近似值。
近义：ideate, imagine, apprehend, interpret, assimilate, penetrate
反义：misapprehend, misconstrue, mishear, misinterpret, misrepresent, misread
adj. 假装的;假冒的;假定的;被承担的;
v. 取得（权力）( assume的过去式和过去分词 );假设;假定;呈现;
"the assumed differences between the two states"
两种状况的假定区别
近义：hypothetical, implicit, implied, phony, presumptive, pretended
反义：apparent, irrefutable, manifest, obvious, ostensible, ostensive
n. 出现;到来;基督降临节（圣诞节前的四个星期）;
"the advent of new technology"
新技术的出现
近义：imminence, approach, arrival, occurrence, coming, commencement
反义：launching, leaving, liftoff, outgoing, parting, takeoff
adj. 真的;真实的，现实的;事实上的;真诚的;
adv. 真正，实在;确实地;
n. 实在，现实;实数;
"I made a real balls-up of my exams."
我考试考得一塌糊涂。
近义：legitimate, authentic, sterling, true, truthful, unfeigned
反义：imaginary, utopical, visional, chimeric, chimerical, dreamlike