In man's early days, competition with other creatures must have been critical.
在人类早期，人类与其他生物的竞争一定是必不可少的。
新概念英语第四册
Lesson 45 Of men and galaxies
📚 句中词汇解析
从本句中提取的重要词汇
n. 竞争;比赛;竞争者;[生]生存竞争;
💡 compet=compete竞争+ition名词后缀 →比赛，竞争
"He was astonished to learn he'd won the competition."
他听说他比赛赢了，感到很惊讶。
近义：joust, match, meet, race, rivalry, tournament
反义：help, assist, assistance, relief, succor, succour
adj. 批评的，爱挑剔的;关键的;严重的;极重要的;
💡 crit判断，分辨+ical...的 → 批评的；危险的
"Now that the situation becomes critical, one must keep calm."
事到临头, 要沉住气.
近义：key, momentous, significant, weighty, winning, watershed
反义：idle, immaterial, inane, inconsequential, inconsiderable, ineffective
adj. 早的;早期的;早日的;（果实等）早熟的;
adv. 早;在初期;先前;提早;
💡 三十“而立”（谐音），人生 早期
"They filed an application to have their case heard early."
他们申请早日审理他们的案子.
近义：onetime, back, previous, prior, old, earlier
反义：hind, hindmost, back, postern, puisne, retral
aux. 必须;必然要;（做出逻辑推断）;（表示坚持）;
n. 必须做的事，必不可少的事物;葡萄汁;霉臭;麝香;
vt.& vi. （表示必要或很重要）必须;（提出建议）应该;得;（表示很可能或符合逻辑）一定;
adj. 不可或缺的;狂暴的;
"You must be able to speak French for this job."
干这项工作你得会说法语。
近义：ought, should, necessaries, necessity, precondition, prerequisite