查询词典 Betulaceae

An inflorescence consisting of a dense spike or raceme of apetalous, unisexual flowers, as in Salicaceae and Betulaceae; an ament.

柔荑花序 Catkin 由无被单性花组成的密集的穗状或总状花序，如杨柳科和桦木科。

A group of chiefly woody plants considered among the most primitive of angiosperms; perianth poorly developed or lacking; flowers often unisexual and often in catkins and often wind pollinated; contains 23 families including the Betulaceae and Fagaceae; sometimes classified as a superorder.

主要是木本植物的一个集合，被视为最原始的木本植物之一；没有花被，或花被发育的较差；其花通常是雌雄同体，为荑花序，通常通过风来受精。

The suspensor is developed fully at the stage of globular embryo and consists of 3 cells, which are degenerated later. The organization and development of the female flower and the type and synchrony of embryogenesis in Betulaceae are also discussed.

本文同时对雌花的结构和发育特点在桦木科各属中的异同、白桦胚胎发生类型及胚胎发育进程的同步性进行了讨论。

Alnus formosana that belongs to Alnus of Betulaceae is a tall deciduous arbor, and its native area locates in Taiwan province.

台湾桤木为桦木科桤木属落叶大乔木，原产台湾。

Alnus formosana that belongs to Alnus of Betulaceae is a tall deciduous arbor, and its native area locates in Tai...

台湾桤木为桦木科桤木属落叶大乔木，原产台湾。

In the present thesis, a detailed review of the literature was given on the Betulaceae.

本文对桦木种植物的研究历史作了详细的总结。

The classification and geographical distribution of Betulaceae of Yunnan Province.

云南桦木科植物的分类与地理分布。

The classification and geographical distribution of Betulaceae of Yunnan Province.

标题 云南桦木科植物的分类与地理分布。

He classification and geographical distribution of Betulaceae of Yunnan Province.

itle 云南桦木科植物的分类与地理分布。

In the strict consensus tree of the 484 trees, the monophyly of Betulaceae and Fagaceae is strongly supported.

胡桃科和桦木科的单系性都得到了分辨，虽然BS支持率不高。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了