By "multicomponent systems" polymer chemists mean polymer blends, copolymers and reinforced composites . 聚合物化学工作者所称的“多组分体系”是指聚合物共混体，共聚物和增强复合材料。
Very early in the century experimenters using open-throat wind tunnels found their tunnels giving very pessimistic results . 在本世纪初期，实验工作者发现用开口风洞得出的结果偏于保守。
One of the consistent workers in determinant theory over a period of more than fifty years was james joseph sylvester . 在50多年内行列式理论的始终不渝的工作者之一是JamesJosephSylvester。
The only way this can be decided is to get scientists and laymen together in a discussion such as the nas forum . 解决这类问题的唯一办法是召集科学工作者与外行人的讨论会。正如NAS讨论会一样。
Some orchardists have tried to control crown-shape by pruning, disbudding and branch-bending to circumvent the problem . 有些种子园工作者曾试用修剪、摘芽，弯枝等办法来控制冠形以解决这个问题。
The basic theory of the method--that of a rigid inclusion in an elastic medium--has been developed by several investigators . 这种方法的基本理论--弹性介质中的刚性包体理论是由若干研究工作者发展的。
The petroleum exploration geologist working with subsurface channel sandstone must have a background knowledge of geomorphology . 和地下的水道砂岩打交道的石油地质工作者，必须具备地貌学方面的基础知识。
The theorist who is unbridled by the limitations of experiment can produce a stream of fanciful ideas that have nothing to do with nature . 没有实验限制的约束，理论工作者可能提出一连串空想出来的与自然界没有联系的概念。
Such notable professionals as john rivers hybridized various tree fruits, and introduced superior clones from france and elsewhere . 著名的专业工作者如JohnRivers对各种果树进行了杂交，并从法国和其他地方引进优良的无性系。
