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.
有时需要花费整整8天时间来搭起绳梯，建立供应基地，然后才能到一个很深的洞穴里。
新概念英语第三册
Lesson 42 Modern cavemen
📚 句中词汇解析
从本句中提取的重要词汇
vt. 建立，创建;确立或使安全;使被安排好;使成为;
💡 e使...+stabl=stable牢固的+ish表动词，“造成…” →设立，建造
"She has donated money to establish a pharmaceutical laboratory."
她捐款成立了一个药剂实验室.
近义：implement, appoint, inaugurate, inchoate, initiate, install
反义：invalidate, abrogate, negate, nullify, outlaw, proscribe
vt. 供给;补充;弥补（缺陷、损失等）;向…提供（物资等）;
n. 供给物;储备物质;粮食;
vi. 暂代他人职务;
💡 sup在下面+ply重叠，折叠→重叠下去→供应[下去],补给
"an adequate supply of hot water"
热水供应充足
近义：minister, munition, procure, provide, provision, purvey
反义：move, rob, take, budge, inadequacy, insufficiency
n. 下降;血统;倾斜;
💡 de向下+scent爬，攀 → 下降；下坡
"The plane began its descent to Heathrow."
飞机开始向希思罗机场降落。
近义：inclination, incline, slant, slope, sklent, sclent
反义：ascension, ascent, mounting, scaling, acclivity, escalade
n. 洞穴;〈方〉地窖;
vt.& vi. （使）塌陷，倒塌;暗中破坏;
vi. 屈服;
💡 cav洞+e → 山洞，洞穴，窑洞
"a dark dank cave"
阴暗潮湿的洞穴
近义：dig, excavate, cavern, crypt, den, dugout
vt. 拿，取;采取;接受（礼物等）;耗费（时间等）;
vi. 拿;获得;
n. 镜头;看法;收入额;场景;
"Students will normally take three A2 subjects."
学生通常要选三门A2证书考试科目。
近义：apprehend, keep, nab, receive, seize, snatch
反义：transfer, cede, give, reject, snub, spurn