beta-carotene

pressure *p阻滞药（用以控制心率，治疗严重胸部疼 痛，以及降低血压J

,beta-'carotene noun [u] a substance found in carrots and other plants, which is needed by humans * (3-胡萝

卜素

'beta decay ziown [sing.] (phys/cs 物）the breaking up of an atom in which an electron is given off * p 衰变 (指原子分裂并释放出一个电子） be-take /bi'teik/ verb (be-took /-tuk/, be-taken /-'teikan/) [VN     (//.fera/y).〜yourself to go somewhere

前往，去（某处）：ffe betoofc himseZ/ to his room•他进 了自己的房间。

'beta test noun a test on a new product, done by sb who does not work for the company that is developing the product 测试（外部对公司新产品的测试I —compare alpha test ►' beta-test verb [VN]

'beta version noun [usually sing.] the version of a new product, especially computer software, that is almost ready for the public to buy or use, but is given to a few customers to test first ( •算机软丨牛等新产品上市前的）

P版，测试版

betel /'bi:tl/ noun [U] the leaves of a climbing plant, also called bete丨，chewed by people in Asia 槟榔叶 'betel nut noun the slightly bitter nut of a tropical Asian palm, that is cut into small pieces, wrapped in betel leaves, and chewed 槟榔果 bete noire /,bet 'nwai(r)/ noun (pi. betes noires /,bet 'nwai(r); NAmE also 'nwairz/) (from French) a person or thing that particularly annoys you and that you do not like_特别讨厌的人（或事物） be-tide /bi'taid/ verb ITgWI see woe be.token /bi_teukan; -'too-/ [VN] (//fera^y) to be a sign of sth 预示；表示：a clear blue sky betokening a 月ne day预示着好天气的晴朗蓝天 be*tray /bi'trei/ verb [VN] 1 ~ sb/sth (to sb) to give infor- mation about sb/sth to an enemy 出卖；tl：露（机密）： For years they had been betraying state secrets to Russia. 他们多年来一直在向俄罗斯泄露国家机密。He w〇5 mon^y to betray his coHeagues.有人收买他出卖他 .由同事。2 to hurt sb who trusts you，especially by not being loyal or faithful to them 辜系；•…不忠：She felt betrayed when she found out the truth about him.

现他的真实情况后，感到受了欺骗。◊Shebetraj^edhis trust over and over again.她一次又一次地辜负了他的 信任。◊ J have never fcnown her to betray a conscience (=tell other people sth that should be kept secret). 我从未听说过她泄6秘密。〇 note at cheat 3 to ignore your principles or beliefs in order to achieve sth or gain an advantage for yourself 背叛（原则或信仰）：He has been accused of betraying his former socialist ideals. ^ A 指责他背弃了他先前的社会主义理想。4〜sth/yourself to tell sb or make them aware of a piece of informa­tion, a feeling, etc., usually without meaning to {

中）泄露信息，流露情感BOB give AWAY: His voice betraye) the worry he was trying to Wde.他的声音掩盖 '不了 内心的担忧。◊ She w〇5 ferried 〇/ saying some­thing that wouid mafce her betray ZierseZj7 (= show her feelings or who she was).她害怕话时泄了自己的底。 be-tray-al /bi'treial/ noun [U, C] the act of betraying sb/sth or the fact of being betrayed (被）背叛，出卖： a sense/a/eeifng/an act o/betmyaZ 被卖 / 被背叛的感 觉；:■背叛行为◊ Z saw her actions as a betrayaZ 〇/ my trust.我认为她的所作所为辜负了我的信任。◊ the many disappointments and betrayals in his life      W

诸多失望与背叛

be-troth-al /bi'trauQl; NAmE -'trou-/ noun ~ (to sb) (formal or old-fashioned) an agreement to marry sb 约；订婚 SSE3 ENGAGEMENT

be*trothed /bi'trauOd; NAmE -'trou-/ adj. {formal or old-fashioned) 1 ~ (to sb) having promised to marry sb 订—f"婚的 KTO ENGAGED 2 sb^ betrothed noun [sing.] the person that sb has promised to marry 已订婚的人；

未婚妻（或夫扣

bet-ter /'beta(r)/ adj., adv., noun, verb 圈口办（comparative of good * good 的比较级）1 of a higher standard or less poor quality; not as bad as sth else