Hummingbirds have discovered that nectar and pollen are very nutritious.

蜂鸟发现花蜜和花粉是很有营养的。

He developed an allergy to pollen.

他对花粉过敏。

Nectar and pollen are very nutritious.

花蜜和花粉是很有营养的。

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

花粉计数高时，枯草热患者的日子就更不好过了。

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

豚草花粉是人类枯草热症的主要致敏源。

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

单核期的小孢子出现壁发育不良和巨大及空花粉现象。

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

花粉粒外壁（花粉壁）通常为特异性的并很难腐烂。

Some large vacuoles appeared in the tapetal cells of the sterile anthers at the early uninucleate pollen stage.

单核早期，不育花粉的四分体有较明显的大泡出现。

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

花粉块 Pollinium (pl. pollinia) 兰科和萝藦科植物，作为传粉单位的蜡质花粉粒团。

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

用扫描电子显微镜观察了蒙古高原鸦葱属植物10个种的花粉形态。

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

(2) 安徽羽叶报春的散孔型花粉显示其报春花属有重要的系统意义和进化意义。

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沟型花粉与真双子叶植物的3沟花粉的相似是趋同演化的结果。

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

克孜勒苏群孢粉组合以松杉目的优势、真蕨目海金沙科的显赫和原始被子植物的出现为特征。

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

被子植物花粉管的生殖（应为雄原核译者注）分裂成两个配子的核。

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

实现了花粉孢子、分子伴侣、以及头颅、颈椎、胫骨、腕骨的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.

花粉壁的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.

花粉症是敏感个体对花粉的一种超敏反应，变态反应性疾病最具代表性。

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.

无论是剑麻花粉的滤还是透析,都能使剑麻蛋白酶激活,证实剑麻花粉含有巯基激活物质。

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、花粉、尘埃、日晒、搔抓等。