The seeds and pollen, or the lack of them, can show severe weather changes over thousands of years.
VOA: special.2010.04.07
The one theory made some investigations of earth spores, hoping to find-- what do you call that stuff that floats around and makes you sneeze? Pollen.
有种学说对于,土地孢子进行了调查,期待发现,通过植物种子的变化推定气候状况的方法
It serves as a landing area for bees and other insects that spread pollen to the plant.
VOA: special.2010.04.06
For example, try to avoid animals with fur,dust, pollen from trees and flowers or cigarette smoke.
VOA: special.2009.07.28
They depend on birds,bees or insects to spread their pollen to another orchid flower.
VOA: special.2010.04.06
Pollen is a fine dust that comes from grass, trees and flowers.
VOA: special.2009.07.28
Scientists also have found pollen from many different kinds of plants.
VOA: special.2010.04.07
Some the more common allergens include animal fur,dust, mold and pollen.
VOA: special.2009.07.28
The most common cause is pollen from flowering plants and trees.
VOA: special.2010.12.21
The action forces the insects to touch the orchid pollen.
VOA: special.2010.04.06
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