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n(1)圓面(圈)((flat round area enclosed by a) curved line that has all of its points at the same distance from the centre)[C]：πr² is the area of a～.πr² 是圓的面積。draw a～畫一個(gè)圓(圈);〖同〗ring;

(2)圓形物，環(huán)(anything like this shape)[C]：a～of mountains/trees/stones/spectators/dancers/haze環(huán)狀山脈/一圈樹/一圈石頭/一圈旁觀者/一圈跳舞的人/一團(tuán)霧氣;be surrounded by a～of admirers被許多崇拜者所包圍;sit in a～坐成圓圈;〖同〗ring，circuit;

(3)包廂座(group of seats in curved and banked rows on a balcony in a theatre，cinema，concert-hall，etc)[C]：(= AmE balcony)：book seats (sit) in the upper/dress～預(yù)定(坐在)上面/前排包廂的座位;The only seats left are in the～.只有包廂中才有空座。

(4)圈子;……界(group of people connected in a formal way sharing common interests，activities，profession，etc)[C]：widen one's～of acquaintances 擴(kuò)大交往圈子;have a large(small)～of acquaintance in political/military/parliamentary～s 在政治/軍事/議會界交往很廣(少);have a large(small)～of friends in scientific/theatrical/business～s 在科學(xué)/戲劇/企業(yè)界朋友很多(少);in wealthy ～s 在有錢人中;one's～of interests某人的興趣范圍;〖同〗group，set，society，sphere，compass;

(5)循環(huán)，周期(chain of events which finishes where it began;cycle)[C]：the～of the seasons/the year 四季/一年的循環(huán);〖同〗cycle，round，revolution;

→′circlet n 小圈(環(huán));′circulate v 循環(huán);?circu′lation n 循環(huán);′circular adj;

v(1)畫(形成)圓圈(draw or make a circle around (sth))[T+n]：～the correct answer/the mistakes with a red pencil用紅鉛筆圈出正確的答案/錯(cuò)誤;Please～the word which you think is wrong.請把你認(rèn)為錯(cuò)的詞圈出來。(fence)～the yard(籬笆)圈著院子;(enemy)～the village(敵人)圍住村子;(hills)～the town(群山)環(huán)抱著鎮(zhèn)子;〖同〗encircle，surround，enclose;

(2)(圍繞……)轉(zhuǎn)圈子(運(yùn)轉(zhuǎn)，盤旋)(move or travel in a circle or circled somewhere or round sth)[T+n，I，I+adv(about/(a)round)+prep(over)，I+adv(about/(a)round)，I+prep(over)]：(plane)be～ing the airport(飛機(jī))在繞機(jī)場飛行;(bird)be～ing the tree(鳥)在繞樹飛;(dancer)be～ing the floor(跳舞者)在繞場地跳舞;(moon)～the earth(月球)繞地球運(yùn)轉(zhuǎn);(spacecraft)～the moon(宇宙飛船)繞月球運(yùn)轉(zhuǎn);(ship)～the iceberg(船)繞過冰山;(helicopter/vulture/hawk)be～ing ((a)round) over their heads (直升飛機(jī)/禿鷲/鷹)在他們頭頂上盤旋;(plane/bird)～in the sky/overhead(飛機(jī)/鳥)在空中/頭頂上盤旋;

【辨異】circle與turn、revolve、rotate、spin、whirl和roll都有“旋轉(zhuǎn)”的意思。turn((使)旋轉(zhuǎn))是通常用詞，指圍繞軸心或(固定的)中心(物體)旋轉(zhuǎn)，如：A gate turns on its hinges.(大門靠折頁轉(zhuǎn)動。)revolve((使)旋轉(zhuǎn))是反復(fù)作圓周運(yùn)動，尤指沿一軌道圍繞一中心旋轉(zhuǎn)，有時(shí)也指一物體圍繞自己的軸心或一中心旋轉(zhuǎn)，如：The moon revolves about the earth.(月亮圍繞地球運(yùn)行。)rotate((使)旋轉(zhuǎn))也是反復(fù)地作圓周運(yùn)動，但僅指一物體圍繞自己的軸心或一中心旋轉(zhuǎn)(此時(shí)可與revolve換用)，如：The earth rotates on its axis.(地球繞軸心旋轉(zhuǎn)。)spin((使)迅速旋轉(zhuǎn))指快速持續(xù)地旋轉(zhuǎn)(通常是在一小范圍內(nèi))，如：A top spins.(陀螺迅速旋轉(zhuǎn)。)whirl((使)快速旋轉(zhuǎn))指快速、持續(xù)地revolve或rotate，如：the whirling blades of a helicopter(直升飛機(jī)飛速旋轉(zhuǎn)的槳葉);circle(盤旋)指任何形式的圓周運(yùn)動(包括圍繞某物的旋轉(zhuǎn))，如：A hawk was circling overhead.(一頭鷹在頭上盤旋。)roll((使)滾動)指曲線形物體(如輪子)在一表面上的轉(zhuǎn)動，如：A ball rolled down the road.(一個(gè)球沿路滾下去。)