高考英语3500单词详解(B开头）baby[5beibi] n.[C]婴儿 2.(作定语)小型，微型，婴儿用的：a baby car 小型汽车 / baby food 婴儿食物bachelor[5bAtFElE]n. 1.[C]单身汉：He remained a bachelor all his life.他做了一辈子单身汉。
2.学士：bachelor’s degree学士学位back[bAk]adv.回(原处)，向后：She walked away without looking back.她头都没回就走了。
adj.后面的：He came in by the back door.他从后门进来。
n.[C]背，后部：Let’s go round to the back.让我们绕到后面去。
backache[5bAkeik]n.[C,U]背痛：suffer from(a) backache患背痛background[5bAkgraund]n.背景，幕后：I’ll need a bit more background information.我需要再了解一点背景情况。
backward[5bAkwEd]adj.向后的，落后的：He is backward in his studies.他功课落后。
adv.向后地，相反地(=backwards)：Your hat is onbackwards.你把帽子戴倒了。
bacon[5beikEn]n.[U]咸猪肉，熏猪肉bacterium[bAk5tiEriEm] n.[C]细菌：Many bacteria cause diseases.许多细菌能致病。
【说明】通常以复数形式出现，复数为bacteria。
bad[bAd]adj. 1.坏的，不好的：Bad news has wings.(谚语)坏消息传得快。
2.有害的：Smoking is bad for your health.抽烟有害健康。
3.腐烂的，变质的：Don’t eat bad fish.不要吃腐烂的鱼。
4.严重的：He has got a bad cold.他患了重感冒。
【说明】为不规则副词，其比较级和最高级分别为worse和worst：I am bad at English,but she is worse.我的英语不好，她的就更糟了。
badly[5bAdli]adv. 1.不好地，恶劣地：She did badly in the exams.她考试成绩很糟。
2.大大地，严重地：The bridge was badly damaged by the flood.桥被洪水损坏得很严重。
3.非常，极度：He wants to go abroad badly.他非常想出国。
/She was badly hurt when she fell from the ladder.她从梯子上跌下来，伤得很厉害。
【说明】为不规则副词，其比较级和最高级分别为worse和worst：He did worse than you.他比你做得更糟。
badminton[5bAdmintEn] n.[U]羽毛球：The kids are playing badminton.孩子们在打羽毛球。
bag[bAg]n.[C]书包，提包，袋子：She carried the bag upstairs.她把袋子扛到了楼上。
baggage[5bAgidV]n.[U]行李：How much baggage do you have?你有多少行李?【说明】不可数名词，要表示几件行李，要借助piece：I have five pieces of baggage.我有5件行李。
bake[beik]v.烤，烘(面包)：She bakes fresh bread every morning.她每天早上都烤新鲜面包。
bakery[5beikEri]n.[C]面包店(房)balance[5bAlEns]n.1.[U,C]平衡：I found it hard to keep my balance on the icy path.我觉得在结冰的路上保持平衡很困难。
2.[C]天平：Will you weigh it in the balance?你用天平称一称好吗？balcony[5bAlkEni] n.[C]阳台：You can see the sea from our balcony.你从我们的阳台上就能看到大海。
ball[bC:l]n. 1.[C]球，球形物：The earth is like a ball.地球是个球状物。
2.[C]舞会：Men and women put on their best clothes to go to a ball.男人和女人参加正式舞会时都穿上最好的衣服。
ballet[5bAlei]n.[C,U]芭蕾舞：I like opera but I’m not keen on ballet.我喜欢歌剧，但不特别喜欢芭蕾舞。
balloon[bE5lu:n]n.[C]气球：Blow the balloon up.把气球吹起来。
ballpoint[bC:lpCint]n.[C]圆珠笔bamboo[bAm5bu:]n.[C,U]竹：a bamboo leaf竹叶ban[bB:n]n. [C]禁令：There is a ban on smoking in petrol stations.加油站禁止吸烟。
v.禁止，取缔：Smoking is banned in school.在学校禁止吸烟。
【说明】1.用作名词时，其后通常接介词on，表示对某事的禁止。
2.用作动词时，表示禁止某人做某事，通常用ban sb from doing sth：He was banned from driving.他被禁止开车。
banana[bE5nB:nE]n.[C]香蕉：Are bananas sold by weight or at how much a piece?香蕉是按重量出售,还是按多少钱一根出售?band[bAnd] n. 1.[C]带，绳，条形物：an iron band铁箍 2.[C]群，帮，伙：a band of robbers一伙强盗 3.[C](吹奏)乐队：a military band军乐队v.(与together连用)团结起来，联合在一起bandage[5bAndidV]n.[C]绷带：a first-aid bandage急救绷带v.(用绷带)包扎：His hand was bandaged.他手上缠着绷带。
bang[bAN]interj.砰：Bang! Another firework flew into the air.砰！又一枚烟花飞向天空。
n.[C]砰的一声：The door shut with a bang.门砰然一声关上了。
v.猛敲，猛撞：They were banging on the door with their fists.他们用拳头砰砰地猛敲门。
bank[bANk]n. 1.[C]岸，堤：We walked along the river bank.我们沿着河岸行走。
2.[C]银行：open a bank account开存款账户bar[bB:]n.1.[C]条，(长方)块，棒：a bar of soap一条肥皂/There is a bar on the gate.门上有个门闩。
2.[C]酒吧，柜台：There are several bars in the hotel.旅馆中有好几个酒吧。
barbecue[5bB:gikju:]n.[C]烤肉野餐：We had a barbecue on the beach.我们在海滩上举行了烧烤野餐。
barber[5bB:bE]n.[C]理发师：Your hair’s getting rather long.It’s time you went to the barber’s.你的头发很长，该去理发店了。
【说明】主要指为男人理发和刮胡子的理发师。
为女人做发式的叫hairdresser(理发师，美容师)。
bare[bZE]adj.1.赤裸的：Don’t walk on that broken glass with bare feet.不要光着脚走在那些碎玻璃上。
2.空的，无…的：a bare and barren land不毛之地 3.仅有的：One bare word would be enough.只要一句话就够了。
bargain[5bB:gin]n.1.[C]廉价买到的东西：I found a lot of bargains in the sale.我发现大减价中有许多便宜货。
2.[C]交易：We’ve made a bargain that he will do the shopping and I’ll cook.我们讲定了，他买东西我做饭。
v.讨价还价：We bargained with him about the price.我们跟他讨价还价。
bark[bB:k] v .狗叫，吼叫：The dog always barks at the postman.这只狗老朝着邮递员叫。
n.[C]狗叫声：The dog next door has a very loud bark.隔壁的狗吠声很大。
barrier[5bAriE] n.[C]障碍：The police put a barrier across the road.警察设了路障。
/the language barrier语言上的隔阂base[beis]n.1.[C]底，基础：The country needs a strong economic base.国家需要稳固的经济基础。
2.[C]基地，本部：That company has offices all over the world,but their base is in Paris.这个公司的办事处遍布全世界，但本部在巴黎。
vt.根据，基于：This news report is based on fact.这篇新闻报导是根据实际情况写成的。
baseball[5beisbC:l]n.[U]棒球：Baseball is the national game of the US.棒球运动是美国全民性的运动。
basement[5beismEnt] n.[C]地下室：She lives in the basement of the apartment house.她住在公寓的地下室。
basic[5beisik]adj.基本的，简单的：He has a basic understanding of the problem.对于这个问题他有基本的了解。