B bachelor n. 单身汉；学士 backbone n. 脊骨，骨干，骨气 bacon n. 咸肉，熏肉 bacterial a. 细菌的，细菌引起的，似细菌的 bacterium n. 细菌 baffle v. ...

A Abbreviate v.缩写，简略 Abide v.遵守，坚持（by） abnormality n. 反常，变态，不规则；反常的事物 abolish v. 废除，取消 abolition n. （法律，习惯等的）废除，取...

Passage 3 In science, a theory is a reasonable explanation of observed events that are related. A the-ory often involves ...

How much pain do animals feel? This is a question which has caused endless controversy. Opponents of big game shooting, for...

Passage 1 The physical distribution of products has two primary aspects: transportation and storage. Both aspects are hig...

cable n．缆，索；电缆；电报 n．海底电报 calculus n．微积分；结石 calibration n．校准；标定，刻度 can aux.v.能，会，可能 n.罐头，听头；容器 vt.装罐头 cancel vt．取消，撤消；删去...

abbreviation n．缩短，缩写 abide v．容忍，忍受 abolish vt．废止, 废除(法律、制度、习俗等) absent a．不在场的；缺乏的 a．不在意的 absorption n．吸收；专注 abstract v...

tabulate vt．制表；列表显示 tack n．大头钉，图钉 tackle n． 滑车（一种工具）v. 解决(问题) tact n．机智，圆滑 tactics n．策略；战术，兵法 tangle vt．使缠结，使纠缠 tanke...

tabulate vt．制表；列表显示 tack n．大头钉，图钉 tackle n． 滑车（一种工具）v. 解决(问题) tact n．机智，圆滑 tactics n．策略；战术，兵法 tangle vt．使缠结，使纠缠 tanke...

ultimate adj．最后的，最终的 ultrasonic a．超声的 n.超声波 ultraviolet a．紫外的n.紫外线辐射 unanimous adj．全体意见一致的 uncertain a．无常的；不确定的 a．不定的；无...