查询词典 Dryopteris

The electron microscopic technique was adopted to study spermatocyte and spermatozoid ultra-structures of Dryopteris crassirhizoma Nakai.

应用电镜技术对蕨类植物绵马鳞毛蕨精母细胞和游动精子的超微结构特征进行了研究。

Two culture methods, sterilized MS medium and garden soil medium, were comparatively studied for spore germination of Dryopteris varia, with the observation of its gametophyte development under light microscope.

应用无菌培养和常规泥土培养两种方法对变异鳞毛蕨孢子进行了比较研究，并在光学显微镜下观察了其配子体的发育过程。

The representative families are Dryopteridaceae, Athyriaceae, Polypodiaceae, Thelypteridaceae, Selaginellaceae and Aspleniaceae. The main genera are Dryopteris, Selaginella, Asplenium, Arachniodes, Pteris, Allantodia and Plagiogyria. The top families' distribution types are cosmopolitan and pantropic ones, the main genera are pantropical ones, while species distribution type belong to the east Asia type and represents the feature of subtropics transition to warm temperated areatype. As for the order of closeness, the sequence of pteridophytes floristic relations between Songyang and the adjacent regions goes as Southwest China, South China, Central China, Japan, North China, Northwest China and Northeast China. The six upland pteridophytes next to Songyang can be put into the same natural flora because of its closest relationship. But compared with other 11 upland fern flora in China, fern in Songyang is not rich enough. There are 37 species endemic to China in Songyang.

结果表明，松阳蕨类植物共有38科72属161种7变种；优势科为鳞毛蕨科、蹄盖蕨科、水龙骨科、金星蕨科、卷柏科、铁角蕨科，优势属为鳞毛蕨属、卷柏属、铁角蕨属、复叶耳蕨属、凤尾蕨属、短肠蕨属、瘤足蕨属；科的分布以世界分布和泛热带分布为主，属的分布以泛热带分布为最多，种以东亚分布类型为主，特别是中国—日本分布类型最多，表现出亚热带向暖温带过渡的特点；本区与邻近地区蕨类植物区系关系的密切程度由大到小依次为西南、华南、华中、日本、华北、西北、东北；与邻近的6个山地蕨类植物区系的亲缘关系密切，可以划为同一自然区；与国内11山地蕨类植物区系相比，松阳的蕨类植物丰富程度不高；松阳拥有37种中国特有蕨类植物及一些珍稀蕨类植物，有较高的保护价值。

Biosystematic studies of Dryopteris.

鳞毛蕨属的生物学系统学研究。

Biosystematic studies of Dryopteris.

标题 鳞毛蕨属的生物学系统学研究。

In habitats of the broad-leaved forest, the dominant tree are the species of Fagaceae in tree layer, Theaceae, Saxifragaceae and Lauraceae in shrub layer, Cyperaceae, Dryopteris spp. and Liliaceae in herb layer.

在阔叶林型栖息地中，乔木层主要树种为壳斗科植物，灌木层植物以山茶科、虎耳草科和樟科等科的种类为主，草本层植物以莎草科、蕨类和百合科为主。

Compound 1 is new; compounds 2, 3 and 4 were isolated from Dryopteris for the first time.

化合物1为新化合物，化合物2，3，4为首次从鳞毛蕨属植物中分离得到。

Compound 1 is a new compound, the others were isolated from Dryopteris for the first time.

结论化合物1为新化合物，其余化合物均为首次从该属植物中分离得到。

Marsh ferns: in some classification systems considered part of genus Dryopteris in family Dryopteridaceae.

沼泽蕨；在一些分类系统中被认为是鳞毛蕨科的鳞毛蕨属的一部分。

Any of various ferns of the genus Dryopteris .

鳞毛蕨属的蕨类植物。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。