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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 our attention in the process some fascinating and little-known works like James 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 pass through，they absorb some of the longer-wavelength，infrared emissions radiated from the Earths surface，radiation that would otherwise be transmitted back into space。 虽然这些分子允许可见波长的辐射自然表露的情感、思维、以及行动方式。 20.A low number of algal cells in the presence of a high number of grazers suggested，but did not prove，that the grazers had removed most of the algae。 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部分水藻。 | 
