16.Is this a defect，or are the authors working out of，or trying to forge，a different kind of aesthetic1？ 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 Johnson’s 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 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 Earth’s 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——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 of dictating7 the details of human behavior but one of imposing8 constraints—ways of feeling，thinking，and acting9 that "come naturally" in archetypal situations in any culture.
这些人类学家所归诸于生物进化的作用，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、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 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部分水藻。
