第二部分 from bacterium to cross twist
    bacterium n. bacteria 細(xì)菌
    balance n. 天平；秤
    The child couldn't keep his balance on his new bicycle 孩子騎在他的新自行車上不能保持平衡。
    You have to balance the advantages of living downtown against the disadvantages. 你必須權(quán)衡住在市中心的利弊。
    He lost his balance and fell over. 他失去平衡,所以跌倒。
    均衡
    The growth of the new political party upset the balance of power. 新政黨的壯大打破了力量的均勢。
    We try to strike a proper balance between the entirely demands of the two parties. (喻) 雙方要求截然不同,我們力圖在其間尋找適當(dāng)?shù)奶幹梅椒ā?BR>    收支差額；余額
    a bank balance銀行余額
    The balance of the wages was devoted to new books on flower culture. 剩下來的工資全用來購買花卉栽培的新書上了。
    May I take the balance of my holidays next month? 我能否在下個月使用還沒休完的假期?
    You may keep the balance. 找頭你留著吧。
    bent test 彎曲實驗
    bent 1 [bent]v. bend 的過去式和過去分詞
    bent adj. 欺詐的；同性的；同性戀愛的；（與on連用）下決心…的 (= bent upon)
    bent n. 彎形，彎度；（與for連用）愛好，才能
    She has a natural bent for music.她有音樂天賦。
    bent 2 [bent]n. 荒草牧場；硬草，葦草
    biochemical adj. 生物化學(xué)的
    bird flue/avian influenza 禽流感
    flue [flu:] n.煙洞, 煙道, 暖氣管, 蓬松的東西, 漁網(wǎng)
    avian adj.鳥類 n.鳥
    influenza n.流行性感冒
    blood serum n. [生化]血清
    bovine spongiform encephalopathy(BSE)\ abbr.牛綿狀腦病 (bovino spongiform encephalopathy);俗稱“瘋牛病”