16.Is this a defect，or are the authors working out of，or trying to forge，a different kind of aesthetic1？ 这到底是一种缺点呢，或者是不是表明，这类作者是在根据一种独一无二的美学体系进行创作，抑或是在试图创立一种独一无二的美学体系？
17.Black Fiction surveys a wide variety of novels，bringing to our attention in theprocess some fascinating and little-known works like James WeldonJohnsons Autobiography2 of an Ex-Colored Man.
《黑人小说》考察了极为广泛的一系列小说，在此过程中让大家注意到了某些引人入胜但却不为人知的作品，如詹姆斯。韦尔登。约翰逊（James Weldon Johnson）的《一个过去是有色人的自传》（Autobiography of an Ex-Colored Man）。
18.Although these molecules3 allow radiation at visible wavelengths4， where most of the energy of sunlight is concentrated，to pass through，they absorb some of the longer-wavelength，infrared5 emissions6 radiated from the Earths surface，radiation that wouldotherwise be transmitted back into space.
虽然这类分子允许可见波长（visible wavelength）的辐射阳光的绝大多数能量就汇集于此不受阻挡地穿透，但它们却会吸收某些较长波长（longer-wavelength），亦即从地球表面辐射出的红外发射（infrared cmission），这种辐射若不是二氧化碳的原故就会被重新输送回太空。
19.The role those anthropologists ascribe to evolution is not of dictating7the details of human behavior but oneof imposing8 constraintsways offeeling，thinking，and acting9 thatcome naturally in archetypal situations in any culture.
这类人类学家所归诸于生物进化有哪些用途，不是规定人类行为的种种细节，而是将各种限制强加于人类即在任何文化的典型情景中都会自然表露的情感、思维、与行动方法。
20.A low number of algal cells in the presence of a high number of grazers suggested，but did not prove， that the grazershad removed most of the algae10.
在存在大量食草动物的同时却只有少量的水藻花粉囊，这暗示出但没能证明食草动物已吞噬了大多数水藻。
