1) alloy powder for fireworks
烟花合金粉
2) pollen assemblages
花粉组合
1.
Artemisia is the dominant taxa of most pollen assemblages, however, the percentages of Gramineae are less than 10% in most steppes.
中国北方草原区39个表土花粉研究表明,蒿属、藜科是草原区花粉组合的主要成分,以禾本科为建群种的草原群落花粉组合以蒿属花粉为主,禾本科花粉多低于10%。
2.
The result shows that surface pollen assemblages reflect similar characteristics for all types of steppe vegetation in general.
现代表土花粉组合与植被关系研究是推断过去植被演化的基础。
3.
Studies on 40 surface pollen assemblages of farmlands and wildlands in arid northwestern area of China show that the pollen concentration of farmlands is lower than that of wildlands,which are 7227 grains/g and 32704 grains/g respectively.
对西北干旱区40个农田和荒地表土样品花粉组合的研究表明:农田花粉平均浓度(7227粒/g)明显低于荒地(32,704粒/g);农田中农作物花粉含量高于荒地,但并不占绝对优势,农田花粉组合不仅反映农田本身的植被组成,而且还反映地方或区域植被组成状况;农田中灌木花粉含量低于荒地,杂草花粉类型比荒地丰富;藜科、蒿属、麻黄花粉都占有较高比例,普遍呈超代表性;不同的农作物花粉百分比指示该样品所在地或周围不同的农作物类型。
4) Pollen assemblage
花粉组合
1.
47m-deep core in Ximencuo lake,Qinghai Province,4 pollen assemblages were distinguished,reflecting the palaeoclimatic changes in the past 2000 years.
通过花粉分析，划分出４个花粉组合带，讨论了２０００年来西门错地区古气候变迁特点。
2.
The results show that the pollen assemblage is dominated by bush and grass with only a little arbor pollen in all study re gions.
通过对天山乌鲁木齐河源区和天山南麓台兰河口区、木扎尔特河口区冰碛物中花粉分析，表明在冰期阶段不同区域的花粉组合均以灌木及草本为主，乔木含量很低，反映冰川所到之处距云杉林均大于5kn。
5) tetrad
[英]['tetræd] [美]['tɛtræd]
四合花粉
1.
All of them are arranged in tetrahedral tetrad and the shape of tetrad is orbicular triangle and adjoin tightly.
杜鹃花属花粉均为四合花粉,呈正四面体排列。
补充资料：烟花行院
1.指妓院。
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