Though a number of descents have been made, much of it still remains to be explored.
人們多次進入洞內探險，但至今尚有不少東西有待勘探。
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

number ['n?mb?] 詞頻1 詞根: number
n. 數字;數量;號碼;編號; v. 標號;總計;把…算作;
?? numer, number 表示”數字”;”計算”,”估算”
"The number of people employed in agriculture has fallen in the last decade."
過去十年，農業從業人數已經下降。
近義：numerate, reckon, recount, sum, tally, cipher 反義：remove, subduct, take, withdraw, deduct
remains [r?'menz]
n. 遺骨，遺體，殘骸，殘余，遺跡;廢墟，遺址，遺跡，剩余（物），余額; v. 留下( remain 的第三人稱單數);保持;留待;仍然是;
?? re向后+mains留下 →剩余物
"Access to the documents remains restricted to civil servants."
這些文件仍僅限公務員使用.
近義：leavings, leftovers, litter, offal, riddlings, rubbish
though [eo] 詞頻1
conj. 雖然，盡管;即使;縱然; adv. 可是，但是;不過;然而;話雖這樣說; prep. 但;
"He's the best teacher, even though he has the least experience."
他雖然經驗最少，卻是最出色的老師。
近義：however, nevertheless, nonetheless, notwithstanding, tho', howbeit
made [meid] 詞頻1
adj. …制的;（人工）做成的，拼成的;虛構的;保證成功的; v. 使(make的過去式和過去分詞);
"He made it absolutely clear."
他把此事講得一清二楚。
近義：manufactured, produced, done, fabricated, artificial, manmade
still [st?l] 詞頻1
adv. 仍，仍然;更，還要;靜靜地;〈詩〉常，不斷地; adj. 不動的，靜止的;不狂暴的，溫柔的;沒有活力的，死氣沉沉的; n. 平靜，寂靜;劇照;靜止攝影;蒸餾器; vt.& vi. （使某物）平靜下來，安靜;〈古〉燒（酒），蒸餾; conj. 但是;然而;
"Although he's nearly 80, he is still very active."
盡管快80歲了，他還是十分活躍。
近義：hush, appease, lull, assuage, mollify, pacify 反義：incite, perturb, shake, trouble, upheave, upset

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