The Brownian movement of pollens also shows the fractal characteristics.
花粉的布朗运动轨迹也具有分形特征.
In contrast , C . sinensis var. sinensis and assamica couldn't be distinguished by the morphology of pollens.
至于不同地区的台湾山茶之间、或是茶与阿萨姆茶之间,皆无法以花粉形态来区分.
E 2 and E 5 sets mainly produced stainable abortive pollens ( SAP ), whereas E 3 set mainly did empty abortive pollens ( EAP ).
E2和E5位点组的作用主要产生染败花粉, 而E3位点组的作用主要产生空败花粉.
Bees from farmlands showed a distinctly narrower range of pollens than both urban and untouched "natural" settings.
来自BBC
Early low-dose exposure to dust mites, pollens, pets and certain foods increases the likelihood of becoming allergic.
来自BBC
Outdoor allergens During spring and early summer - from March to May - tree pollens are the main outdoor allergen.
来自BBC