In both cases, however, the adaptation is secondary to the primary purpose of the DTD — that is, if you are primarily authoring books, it makes the most sense to use a DTD that is designed for books.
但无论哪种情况，对于DTD的主要目标而言这种适应性是第二位的，就是说，如果编写图书，最好的办法是使用为图书设计的DTD。
Plant secondary metabolites is an adaptation of plants to circumstances, and its result of plant interacting with biotic factor and abiotic factor in the permanent evolution.
植物次生物质是植物对环境的一种适应，是在长期进化过程中植物与生物和非生物因素相互作用的结果。
Many vessel numbers, small pore, libriform fibres (mechanical tissue)and obvious secondary thickening of xylem tissue are the features of adaptation to the environment.
红树植物导管数量多、管孔小、机械组织为韧型纤维，薄壁组织次生加厚明显是适应环境的特征。
应用推荐