It can take as long as eight days to rig up rope ladders and to establish supply bases before a descent can be made into a very deep cave.
有時需要花費整整8天時間來搭起繩梯，建立供應基地，然后才能到一個很深的洞穴里。
新概念英語第三冊
Lesson 42 Modern cavemen
?? 句中詞匯解析
從本句中提取的重要詞匯
vt. 建立，創建;確立或使安全;使被安排好;使成為;
?? e使...+stabl=stable牢固的+ish表動詞，“造成…” →設立，建造
"She has donated money to establish a pharmaceutical laboratory."
她捐款成立了一個藥劑實驗室.
近義：implement, appoint, inaugurate, inchoate, initiate, install
反義：invalidate, abrogate, negate, nullify, outlaw, proscribe
vt. 供給;補充;彌補（缺陷、損失等）;向…提供（物資等）;
n. 供給物;儲備物質;糧食;
vi. 暫代他人職務;
?? sup在下面+ply重疊，折疊→重疊下去→供應[下去],補給
"an adequate supply of hot water"
熱水供應充足
近義：minister, munition, procure, provide, provision, purvey
反義：move, rob, take, budge, inadequacy, insufficiency
n. 下降;血統;傾斜;
?? de向下+scent爬，攀 → 下降；下坡
"The plane began its descent to Heathrow."
飛機開始向希思羅機場降落。
近義：inclination, incline, slant, slope, sklent, sclent
反義：ascension, ascent, mounting, scaling, acclivity, escalade
n. 洞穴;〈方〉地窖;
vt.& vi. （使）塌陷，倒塌;暗中破壞;
vi. 屈服;
?? cav洞+e → 山洞，洞穴，窯洞
"a dark dank cave"
陰暗潮濕的洞穴
近義：dig, excavate, cavern, crypt, den, dugout
vt. 拿，取;采取;接受（禮物等）;耗費（時間等）;
vi. 拿;獲得;
n. 鏡頭;看法;收入額;場景;
"Students will normally take three A2 subjects."
學生通常要選三門A2證書考試科目。
近義：apprehend, keep, nab, receive, seize, snatch
反義：transfer, cede, give, reject, snub, spurn