The big,empty and abortive pollen grains are abserred at the stage of uninuclear microspore.

单核期小孢子出现壁发育不良和巨大及空现象。

The pollen of the weed is the main sensibiligen of hay fever in human.

豚草是人类枯草热症主要致敏源。

Hay fever sufferers have a worse time when the pollen count is high.

计数高时，枯草热患者日子就更不好过了。

Hummingbirds have discovered that nectar and pollen are very nutritious.

蜂鸟发现蜜和是很有营养。

He developed an allergy to pollen.

他对过敏。

Nectar and pollen are very nutritious.

蜜和是很有营养。

A mass of waxy pollen grains transported as a unit in many members of the Orchidaceae and Asclepiadaceae.

块 Pollinium (pl. pollinia) 在许多兰科和萝藦科植物中，作为传单位蜡质粒团。

The outer wall (extine) of the pollen grain is often diagnostic (see pollen) and very resistant to decay.

粒外壁（壁）通常为特异性并很难腐烂。

The pollen morphology of 10 species of Scorzonera genus in the Mongolian Plateau was observed by scanning electronic microscope.

用扫描子显微镜观察了蒙古高原鸦葱属植物10个种形态。

(2) The pantoporate pollen of P. merrilliana shows that the species has vital taxonomical and evolutionary significance in Primula.

(2) 安徽羽叶报春散孔型显示其在报春属中有重要系和进化。

The Kizilsu palynofloras are characterized by the dominance of coniferae, abundance of schizaeaceous ferns and presence of primitive angiospermous pollen.

克孜勒苏群孢组合以松杉目优势、真蕨目海金沙科显赫和原始被子植物出现为特征。

Generative nuclei The two gametic nuclei formed by the division of the generative cell in the pollen tube of angiosperms.

在被子植物管中生殖细胞（应为雄原核译者注）分裂成两个配子核。

The similarity of its heteropolar 3- or 6-aperturate pollen to the 3-aperturate pollen of Eudicots might result from convergent evolution.

其异极3沟或6沟型与真双子叶植物3沟相似是趋同演化结果。

But fed with oakery pollen,indices as above were 9. 59 days, 37. 17 days, 3. 89 days,and 0. 86 per day,respectively.

而用青杠饲养，其发育历期长达9．59天，雌雄成螨寿命缩短为37．17天和3．87天，日平均产卵量仅0．86粒。

As a result, this paper presents the 3D reconstruction segmentation display, and analysis results of pollen spore, chaperonin, head, cervical vertabra, tibia and carpale.

实现了孢子、分子伴侣、以及头颅、颈椎、胫骨、腕骨三维重建分析测量与分割。

The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.

壁外壁分为外层和内层，外层包括覆盖层、基粒棒和基足层等三层，内层只包含一层。

Chromosome 12 of pollen mother cell of japonica trisomic rice (Oryza sativa L.) was successfully isolated using microglassneedles under the micromanipulator in this study.

首次以粳稻第12号三体为材料，采用玻璃针染色体微分离法，成功地分离到了水稻第12号染色体。

Pollen disease is a kind of hypersensitiveness occurring on the sensitive individuals to the allergic pollen, and is the most representative disease of allergic diseases.

症是敏感个体对一种超敏反应，在变态反应性疾病中最具代表性。

Both the filtrate and the dialyzate of agave pollen can activate the enzyme, thus proving that there was activating substance of the thiol group in agave pollen.

无论是剑麻滤液还是透析液,都能使剑麻蛋白酶激活,证实剑麻中含有巯基激活物质。

The external factor like chemical agent, the cosmetics, the zootoxin, the fish and shrimp, the pollen, the dust, the solarization, scratch with the finger grasp and so on.

外因如化学制剂、化妆品、动物毒素、鱼虾、、尘埃、日晒、搔抓等。