A midge gathers pollen from a cacao flower by sticking its head inside a "petal pouch" that contains both pollen and a sticky nectar reward.

一只摇蚊把它的头伸进一个“花瓣囊”里，收集可可花的花粉，“花瓣囊”里既有花粉，也有粘稠的花蜜。

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If you have pollen allergies, you should either avoid flowering plants or snip off the flower buds as soon as they appear.

如果您对花粉过敏，您应该避免开花植物，或者在它们出现后，立即剪掉它们。

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Without it stopping to feed and spreading pollen from flower to flower, these plants would cease to exist.

如果它不停下来进食，不把花粉从一朵花传到另一朵花，这些植物就会不复存在。

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They depend on birds,bees or insects to spread their pollen to another orchid flower.

VOA: special.2010.04.06

The air passages constrict when allergens (flower pollen, for instance) or other irritants are inhaled.

CNN: Making Child's Play Fun

The episode is known as the Younger Dryas, because in Scandinavia abundant pollen from a tundra flower called the mountain avens, Dryas octopetala, reappears in soil from this date, indicating that the forest had once more given way to tundra.

WSJ: Matt Ridley on New Support for a Global-Cooling Theory | Mind & Matter

Stripes on petal veins direct bumblebees to the flower's "central landing platform" and entrance to gather nectar and pollen.

BBC: A bumblebee extracting nectar and pollen from a snapdragon