atmosphere in which plants and animals can live ^

物圈

bio-tech-nol-ogy /.baiautek'nDladsi; NAmE .baioutek- 'na:l-/ (also informal bio-tech /'baiautek; NAmE 'baiou-/) noun [U] {technical 7|t i§) the use of living cells and bacteria in industrial and scientific processes 生物科技 ► bio-tech-no-logic-al adj. ： biotechnological research ^ 物科技研究

bi-ot-ic /bai'Dtik; NAmE bai'aitik/ adj. {biology of or related to living things 生物的；生命的 bio-type /'baiautaip; NAmE 'baiou-/ noun {biology a group of living things with exactly the same combin­ation of genes 生物型 （ 基因组合完全相同的一组生物） bi-partisan /.baipaiti'zaen; NAmE ,bai'pa:rtizn/ adj. involving two political parties 两党酷；涉及两金的： a bipartisan poiicy两党淼支持的®策 bi-par-tite /bai'paitait; NAmE -'pa:rt-/ adj. {technical 7|tT§) involving or made up of two separate parts 有两个部分 的；两部分组成的

biped /'baiped/ noun {technical any creature with two feet 两足;^物 _ compare quadruped bi-pedal /.bai'piidl; NAmE also -'pedl/ adj. [technical 7^^) (of animals 动物）using only two legs for walking 双足

行走的；两腿行走的

bi-plane /'baiplein/ /iown an early type of plane with two sets of wings, one above the other ...(早期.的）.双翼 飞机一picture o page Rii _ compare monoplane bipolar /,bai'p0ula(r); NAmE -'poular/ (also .manic- de pressive) adj. (psychology 心）suffering from or connected with bipolar disorder 双相型障碍的；躁狂抑 郁性精神病的►bipolar (also ,manic-de_pressive) /iow/i bi, polar dis1 order (also ,bi,polar af.fective dis- 'order) noun [U, C] (also , manic degression [U]) {psych- o/ogy 心）a mental illness causing sb to change suddenly from being extremely depressed to being extremely happy双相型障碍；躁狂抑郁性精神病 birch/b3：tS; NAmEb3：rtS/ noun 1 [C, U] (also 'birch tree[C]) a tree with smooth bark and thin branches, that grows in northern countries 桦树；白桦树一see also silver birch 2 (also birch-wood /'b3：tXwud; NAmE 'b3：rti-/) [l}] the hard pale wood of the birch tree 桦木 3 the birch [sing.] the practice of hitting sb with a bunch of birch sticks, as a punishment用桦木条抽打（作为惩罚)*'. bird 0-w /b3：d; NAmEb3：rdl noun

1                  a creature that is covered with feathers and has two wings and two legs. Most birds can fly•鸟；禽：a Mrd’s nest with two eggs fn it内有两只.鸟蛋的鸟窝◊ a species 〇/ bird —种鸟◊ 77ie area has a weaZth 0/ bird 啡.这个地区栖息#夫量的鸟。一 picture.0 page R28 —see also game bird, seabird, songbird, waterbird

2                  {BrE, slang, sometimes offensive) a way of referring to a young woman 姑娘；妞 _ see also dolly bird

3                  {informal) a person of a particular type, especially sb who is strange or unusual in some way 某美人；（尤 指）古怪的人，不寻常的人：a wise oZd bird处世老练

A 〇 She is that rare bird: a politician with a social conscience.她是这么一种少见的人：有社会良知的政治 家。be (strictly) for the birds {informal) to not be important or practical 不重要；不或际 the bird has 'flown the wanted person has escaped 要抓的人逃掉了 a bird in the hand is worth two in the 'bush {saying) it is better to keep sth that you already have than to risk losing it by trying to get much more —鸟在手胜过 双鸟在林（满足于现有的总比因过分追求而失去一切好） the birds and the 'bees {humorous) the basic facts about sex, especially as told to children (尤指跟儿童讲 的）性的主$知识 a .bird’s-,eye 'view (of sth) a view of sth from a high position looking down 鸟瞰；俯视 birds of a 'feather (flock to'gether) (soy/ng) people of the same sort (are found together) 人（聚吾一起）； 物以类聚 give sb/get the ’bird   1 (8r£) to

shout at sb as a sign of disapproval; to be shouted at (被）喝倒彩 2 (/SWm£). to make a rude sign at sb with your middle finger; to have this sign made at you 向某 人竖起中指.（表示侮辱）；受到竖中指的侮辱一more at EARLY adj., KILL V., LITTLE adj.