for one of the necessary conditions of preservation is quick burial,
因為保存的必要條件之一是迅速掩埋，
新概念英語第四冊
Lesson 26 The past life of the earth
?? 句中詞匯解析
從本句中提取的重要詞匯
adj. 必要的;強制的;必然的;不可避免的;
n. 必需品;
?? necess必要 + ary 表示有...性質的， → a.必要的；必然的
"Vitamin D is necessary to aid the absorption of calcium from food."
從食物中吸取鈣需靠維生素D的幫助。
近義：indispensable, inevitable, mandatory, needful, obligatory, obliged
反義：needless, pointless, profitless, purposeless, redundant, reiterative
n. 保存，保留;保護;防腐;維護，保持;
?? pre預先+serv保持+ation名詞后綴 → 保存
"The police are responsible for the preservation of law and order."
警察負責維持法律與秩序.
近義：husbandry, keeping, maintenance, preserval, preserving, upkeep
burial
['b?r??l]
n. 葬，掩埋;葬禮;
?? buri=bury埋葬 + al 名詞后綴, 行為、事情 → n. 葬禮,葬,掩埋
"Cremation is more common than burial in some countries."
在一些國家,火葬比土葬普遍.
近義：inhumation, interment, sepulture, burying, entombment, funeral
反義：disinterment
adj. 快的，急速的;聰明的，凌厲的;靈活的;短時間做成的;
adv. 迅速地，快速地;
n. （指甲下的）活肉;感情的中樞，感覺最敏銳的地方;要害，核心;
"The government spokesman gave a quick briefing to the reporters."
政府發言人向記者們作了情況簡介.
近義：hurried, abrupt, limber, lissom, lissome, lithe
反義：lagging, leisurely, phlegmatic, poky, slowish, sluggardly