31. Although apparently rigid，bones exhibit a degree of elasticity that enables the skeleton to withstand considerable impact. 骨頭看起來是脆硬的，但它也有一定的彈性，使得骨骼能夠承受相當的打擊。

　　32. That xenon could not form chemical compounds was once believed by scientists. 科學家曾相信：氙氣是不能形成化合物的。

　　33. Research into the dynamics of storms is directed toward improving the ability to predict these events and thus to minimize damage and avoid loss of life. 對風暴動力學的研究是為了提高風暴預測從而減少損失，避免人員傷亡。

　　34. The elimination of inflation would ensure that the amount of money used in repaying a loan would have the same value as the amount of money borrowed. 消除通貨膨脹應確保還貸的錢應與所貸款的價值相同。

　　35. Futurism，an early twentieth-century movement in art，rejected all traditions and attempted to glorify contemporary life by emphasizing the machine and motion. 未來主義，二十世紀早期的一個藝術思潮。拒絕一切傳統，試圖通過強調機械和動態來美化生活。

　　36. One of the wildest and most inaccessible parts of the United States is the Everglades where wildlife is abundant and largely protected. Everglades是美國境內最為荒涼和人跡罕至的地區之一，此處有大量的野生動植物而且大多受(法律)保護。

　　37. Lucretia Mott's influence was so significant that she has been credited by some authorities as the originator of feminism in the United States. Lucretia Mott的影響巨大，所以一些權威部門認定她為美國女權運動的創始人。

　　38. The activities of the international marketing researcher are frequently much broader than those of the domestic marketer. 國際市場研究者的活動范圍常常較國內市場研究者廣闊。

　　39. The continental divide refers to an imaginary line in the North American Rockies that divides the waters flowing into the Atlantic Ocean from those flowing into the Pacific. 大陸分水嶺是指北美洛磯山脈上的一道想象線，該線把大西洋流域和太平洋流域區分開來。

　　40. Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weight is placed on them. 對地球引力的研究表明，在不尋常的負荷之下地殼和地幔會發生位移。

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