1) second generation
二代
1.
The community structure, tree species composition, biodiversity and diameter structure of Castanopsis carlesii forest (8-year old) by AMPR(artificial measures promoting regeneration) of first generation after clear-cutting are similar to the second generation(6-year old).
皆伐形成的一代(8a生)和二代(6a生)人促米槠林的群落结构、组成树种、物种多样性、直径结构等均相近;但一代人促米槠林以有性(实生)起源为主,二代人促米槠林以无性(萌芽)起源为主,二代林分生产力明显大于一代林分,充分体现萌芽更新的早期速生性。
2.
The community and measuration features comparison between 8-year old first and 6-year old second generation stands in the same plot showed: Two stands structure were similar.
同一地林块８年生一代和６年生二代人促闽粤栲林分群落学特征及测树学特征对比评价结果表明：两代林分群落结构相近；二代林分乔木层物种多样性指数、均匀度比一代林分略大；二代林分生产力较一代林分的低，但仍保持较高的生产力。
2) second filial (F2) generation
第二子代;子二代`
3) dibromoalkane
二溴代烷
1.
Catalysis of sulfuric acid has been investigated in the preparation of dibromoalkane by epoxy compound and aliphatic diol .
以二溴代烷制备为例,探讨了浓硫酸在二溴代烷制备过程的催化作用及研究脂肪族二元醇与环氧化合物转化为二溴代烷的难易。
4) di-substituted benzene
二取代苯
1.
The Vis research result of binding processes of host β-cyclodextrin and guest di-substituted benzenes in aqueous solution is reported in this article.
报道了水溶液中β -环糊精主体与二取代苯客体包结过程的可见光谱研究结果。
5) disubstituted urea
二取代脲
1.
The Rh-DMImBF 4/SiO 2-gel ionic liquid catalyst was prepared through sol-gel method, and its catalytic activity in synthesis of N,N′ -disubstituted ureas by oxidative carbonylation of amines was measured.
采用溶胶 凝胶法制备了硅胶负载Rh(PPh3 ) 3 Cl 离子液体催化剂Rh DMImBF4/SiO2 gel,并对其催化胺类化合物氧化羰化制二取代脲反应的活性进行了考察 。
6) the second generation
第二代
1.
This article is the summary of working experience for the second generation digital gravimetric map drawing,mainly introduced the preparation of data before drawing and the selection of net parameter and projection parameter when use Mapgis software for digital drawing and some other problems.
本文是第二代数字重力图制图的工作经验总结,主要介绍了制图前数据的准备以及利用Mapgis软件进行数据成图时网格参数和投影参数的选择等一些问题。
补充资料：二代
1.两个朝代。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条