1. Typical of the grassland dwellers of the continent is the American antelope, or pronghorn.
     美洲羚羊，或稱叉角羚，是該大陸典型的草原動(dòng)物。
     2. Of the millions who saw Haley’s comet in 1986, how many people will live long enough to see it return in the twenty-first century.
     1986年看見(jiàn)哈雷慧星的千百萬(wàn)人當(dāng)中，有多少人能夠長(zhǎng)壽到足以目睹它在二十一世紀(jì)的回歸呢？
     3. Anthropologists have discovered that fear, happiness, sadness, and surprise are universally reflected in facial expressions.
     人類學(xué)家們已經(jīng)發(fā)現(xiàn)，恐懼，快樂(lè)，悲傷和驚奇都會(huì)行之于色，這在全人類是共通的。
     4. Because of its irritating effect on humans, the use of phenol as a general antiseptic has been largely discontinued.
     由于其對(duì)人體的影響刺激,一般使用酚作為防腐劑已基本停止.
     5. Any profit organizations to survive and ultimately consumers must produce usable or needed products.
     任何盈利組織若要生存，最終都必須生產(chǎn)出消費(fèi)者可用或需要的產(chǎn)品。
     6. The greater the population there is in a locality, the greater the need there is for water, transportation, and disposal of refuse.
     一個(gè)地方的人口越多，其對(duì)水，交通和垃圾處理的需求就會(huì)越大。
     7. It is more difficult to write simply, directly, and effectively than to employ flowery but vague expressions that only obscure one’s meaning.
     簡(jiǎn)明，直接，有力的寫(xiě)作難于花哨，含混而意義模糊的表達(dá)。
     10. The knee is the joints where the thigh bone meets the large bone of the lower leg.
     膝蓋是大腿骨和小腿脛的連接處。
     11. Acids are chemical compounds that, in water solution, have a sharp taste, a corrosive action on metals, and the ability to turn certain blue vegetable dyes red.
     酸是一種化合物，它在溶于水時(shí)具有強(qiáng)烈的氣味和對(duì)金屬的腐蝕性，并且能夠使某些藍(lán)色植物染料變紅。
     12. Billie Holiday’s reputation as a great jazz-blues singer rests on her ability to give emotional depth to her songs.
     Billie Holiday’s作為一個(gè)爵士布魯斯樂(lè)杰出歌手的名聲建立在能夠賦予歌曲感情深度的能力。