The lake was not a natural one, but a man-made reservoir.
这不是一个天然湖泊，是一座人工修建的水库。
新概念英语第三册 Lesson 57 Back in the old country

📚 句中词汇解析

从本句中提取的重要词汇

natural ['nætʃrəl] 词频1 词根: nat
adj. 自然的;物质的;天生的;不做作的; n. 自然的事情;（生来的）白痴;[乐]（风琴等的）白键;
💡 natur=nature自然+al...的 →自然（界）的
"She showed a natural aptitude for the work."
她表现出了做这工作的天赋。
近义：inherent, lifelike, unaffected, native, raw, unprocessed 反义：hypothetical, illusional, illusionary, illusive, illusory, imaginative
reservoir ['rɛzɚ,vɔr] 词频4 词根: serv
n. 蓄水池;贮液器;储藏;蓄积;
💡 reserv保留+oir场所→保留水的地方 → 水库；贮藏所
"The day was drawing near when we should have completed the reservoir."
我们完成水库工程的日子不远了.
近义：recipient, tank, vat, resource, reserve, dam
lake [lek] 词频1
n. 湖;深红色颜料;胭脂红;[化]色淀; vt.&vi. 血球溶解;使（血液）发生血球溶解;
"Fish are abundant in the lake."
湖里鱼很多。
近义：lagoon, loch, lacustrine
made [meid] 词频1
adj. …制的;（人工）做成的，拼成的;虚构的;保证成功的; v. 使(make的过去式和过去分词);
"He made it absolutely clear."
他把此事讲得一清二楚。
近义：manufactured, produced, done, fabricated, artificial, manmade

📚 更多「新概念英语第三册」例句

He will be earning only half as much as he used to,
他将来挣的钱只有他现在的一半。
Just as Mrs.Richards was entering the dinning room, there was a knock on the front door.
理查兹夫人刚刚走进餐厅，前门就传来敲门声。
He was sent to prison for failing to pay his debts and died in poverty in 1836.
他因无力还债而被捕入狱，最后于1836年在贫困中死去。
It took him four years to stage this elaborate joke simply to prove that critics do not always know what they are talking about.
他花了4年时间策划这出精心设计的闹剧，只是想证明评论家们有时并不解他们所谈论的事情。
He threatened to call the police.
威胁说要去叫警察。
I gave up in despair.
我无可奈何，只好罢休。