Sam was sure that the wallet must have been found by one of the villagers, but it was not returned to him.
萨姆确信那钱包一定是被某个村民捡到了，可是却不见有人来送还给他。
新概念英语第二册
Lesson 45 A clear conscience
📚 句中词汇解析
从本句中提取的重要词汇
vt. 创办，成立，建立;
v. 发现（ find的过去式）;找到;到达;发觉;
💡 found基础 → 为(房屋等)打基础，建立，创立
"In some stories, genies are always found inside a lamp or bottle."
在一些故事里, 灯里或瓶子中总是装有妖怪.
近义：base, ground, establish, institute, mount, rest
反义：invalidate, abrogate, negate, nullify, omit, outlaw
adj. 确信的，确实的;有把握的;无疑的;一定的;
adv. 当然;确实地;无疑地;
"Make sure the shelf is aligned with the top of the cupboard."
务必使搁架与橱柜顶端对齐。
近义：inarguable, incontestable, incontrovertible, indefectible, indisputable, indubitable
反义：hesitant, hesitative, imprecise, improbable, inconclusive, indecisive
n. 钱包，皮夹子;
💡 墙(wall)上有外星人(et)的 钱包
"You'll have to go to the police station to reclaim your wallet."
你得到警察局去认领你的钱包。
近义：notecase, billfold, pocketbook
aux. 必须;必然要;（做出逻辑推断）;（表示坚持）;
n. 必须做的事，必不可少的事物;葡萄汁;霉臭;麝香;
vt.& vi. （表示必要或很重要）必须;（提出建议）应该;得;（表示很可能或符合逻辑）一定;
adj. 不可或缺的;狂暴的;
"You must be able to speak French for this job."
干这项工作你得会说法语。
近义：ought, should, necessaries, necessity, precondition, prerequisite
returned
[ri'tə:nd]
adj. 被送回的，归来的;
v. 返回，回来( return的过去式和过去分词 );恢复;还;归还;
"He resigned as Home Secretary and returned to the back benches."
他辞去了内政大臣的职务，回到后座议员席。