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16.Is this a defect，or are the authors working out of，or trying to forge，a different kind of aesthetic? 这究竟是一种缺陷呢，或者是否表明，这些作者是在按照一种与众不同的美学体系进行创作，抑或是在试图创立一种与众不同的美学体系? 17.Black Fiction surveys a wide variety of novels，bringing to ourattention in the process some fascinating and little-known works likeJames Weldon Johnsons Autobiography of an Ex-Colored Man. 《黑人小说》考察了极为广泛的一系列小说，在此过程中让我们注意到了某些引人入胜但却鲜为人知的作品，如詹姆斯韦尔登约翰逊的《一个曾经是有色人的自传》 18.Although these molecules allow radiation at visible wavelengths，where most of the energy of sunlight is concentrated，to passthrough，they absorb some of the longer-wavelength，infrared emissionsradiated from the Earths surface，radiation that would otherwise betransmitted back into space. 虽然这些分子允许可见波长的辐射阳光的绝大部分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，亦即从地球表面辐射出的红外发射，这种辐射若不是二氧化碳的缘故就会被重新输送回太空。 19.The role those anthropologists ascribe to evolution is not ofdictating the details of human behavior but one of imposingconstraints-ways of feeling，thinking，and acting that come naturallyin archetypal situations in any culture. | 
