It has been found that certain bats emit squeaks and by receiving the echoes,
人們發現，某些蝙蝠能發出尖叫聲，
新概念英語第四冊 Lesson 7 Bats

?? 句中詞匯解析

從本句中提取的重要詞匯

found [fa?nd] 詞頻1 詞根: found
vt. 創辦，成立，建立; v. 發現（ find的過去式）;找到;到達;發覺;
?? found基礎 → 為(房屋等)打基礎，建立，創立
"In some stories, genies are always found inside a lamp or bottle."
在一些故事里, 燈里或瓶子中總是裝有妖怪.
近義：base, ground, establish, institute, mount, rest 反義：invalidate, abrogate, negate, nullify, omit, outlaw
certain ['s?:t?n] 詞頻1 詞根: an
adj. 某一;必然的;已確定的; pron. [動詞用復數]某些;
"Federal courts have a certain cachet which state courts lack."
聯邦法院有某種州法院所缺乏的特別的東西.
近義：some, inarguable, indisputable, indubitable, invariable, irrefragable 反義：neither, implausible, improbable, uncertain, unlikely, avoidable
emit [i'mit] 詞頻5 詞根: e
vt. 發出;發射;頒布;發表;
?? 向外(e字根)送出去(mit字根)- 發射
"The metal container began to emit a clicking sound."
金屬容器開始發出咔嗒咔嗒的聲音。
近義：issue, radiate, release, shed, spring, beam 反義：sip, soak, sop, sponge, suck, sup
bats
a. 瘋瘋癲癲的, 怪異的
近義：insane, lunatic, mad, moonstruck, nuts, nutsy
receiving [ri'si:vi?]
n. 接受;收款，收貨; adj. 接受的; v. 收到( receive的現在分詞 );接到;接納;接待;
"He is receiving treatment for shock."
他正在接受休克治療。
近義：recipient, collector

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