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要求I didn39。t want to go but he insisted.我并不想去,但他硬要我去。18. 中心,中間 center, core, middle, midstcenter n. 中心;集中點(diǎn)指空間、地域或物體的中心點(diǎn),也可指學(xué)術(shù)、商業(yè)等活動(dòng)的中心。There is a huge oak table in the centre of the meeting room.會(huì)議室中央有一張巨大的橡木桌子。Beijing is the political and cultural centre of China.北京是中國的政治和文化中心。core n. 核心指某物體的中心部分或某事物最重要的部分。Remove the cores, and thinly slice the apples. 去除果核,把蘋果切成薄片。The core of their appeal is freedom of speech. 他們吁求的核心是言論自由。我們要尊重彼此核心利益和重大關(guān)切。We should respect each other39。s core interests and major concerns.middle n. 中間,中央,中部指空間、時(shí)間或事件的中間部分。He came back home in the middle of the night.他半夜才回家。midst n. [正式]中間指位于某地的中部或者處于一群人、一堆物品中間,也可指在某事的進(jìn)行過程中。We found him in the midst of a group of his usual friends.我們?cè)谒囊蝗豪吓笥阎姓业搅怂?。In the midst of my work I snatched an hour39。s rest.我在工作中趁隙休息了一個(gè)鐘頭。19. 障礙 obstacle, barrier, obstruction, barobstacle n. 障礙(物)指在達(dá)到目的或前行的過程中必須消除或繞過的障礙(物),可以是具體的或抽象的東西。Terrorism is an obstacle to peace. 恐怖主義是和平的障礙。His car hit an obstacle yesterday in the petition. 昨天他的車在比賽中撞上了障礙物。barrier n. 障礙,壁壘多指產(chǎn)生阻礙或限制作用的政策、法律、問題等。The removal of trade barriers means a lot to that country.貿(mào)易壁壘的消除對(duì)那個(gè)國家而言意義重大。obstruction n. 障礙物,阻塞物There may be an obstruction in the drainpipe. 排水管里可能有阻塞物。Remove the vehicle that is causing the obstruction.把造成阻塞的車輛挪走。bar n. 障礙;阻礙;妨礙bar作名詞有“條,棒”之意,作動(dòng)詞時(shí)可指用木條,鐵條等閂門等,由此義可以引申為“阻攔;阻擋”,名詞意思為“障礙,阻礙”,指做某事的障礙,通常為抽象之物。They have decided to set a bar to petition.他們已經(jīng)決定要設(shè)置障礙以阻止競(jìng)爭(zhēng)。At that time being a woman was a bar to promotion in this profession.那時(shí)在這一職業(yè)中,身為女性便是晉升的障礙。20. 邊界 border, boundary, frontierborder n. 邊界,邊境多指靠近兩國或兩地區(qū)分界線的區(qū)域。Two years later, he was sent to the border between China and Myanmar. 兩年以后,他被派到了中緬邊界。a national park on the border between Kenya and Tanzania位于肯尼亞和坦桑尼亞邊界的國家公園boundary n. 邊境線,分界線側(cè)重指某區(qū)域最外的界線,常和領(lǐng)土有關(guān),也指地圖上正式標(biāo)定的、雙方認(rèn)可的邊界或較小行政單位間的界線。They marked the boundaries of the basketball court.他們標(biāo)出了籃球場(chǎng)的邊界。The river forms the boundary between my land and his. 這條河構(gòu)成了我這塊地和他那塊地之間的分界線。frontier n. [尤英] 邊界,邊境 指兩國接壤的前沿地區(qū),多有軍隊(duì)駐防。Soldiers guard the frontier against invasion. 戰(zhàn)士們守衛(wèi)邊疆,防止外敵入侵。