Instead, they rely on outside forces to transport their tiny pollen grains from male flower parts to female ones.

取而代之的是，它们依靠外部力量将微小的花粉粒从雄花转移到雌花。

Some pollen grains get stuck to the bee's fuzzy, sticky body.

一些花粉粒粘在蜜蜂毛茸茸、粘稠的身体上。

And during that visit, the insect got pollen grains stuck to the base of its mouthparts.

在那次访问期间，这种昆虫 的口器底部粘有花粉粒。

In describing his work he made an analogy to Brownian motion, the jostling movement of pollen grains in water that was first observed down a microscope by Robert Brown, a botanist, in 1827.

在描述他的工作时，他将其比作布朗运动，1827年植物学家罗伯特·布朗（Robert Brown）首次在显微镜下观察到水中花粉颗粒的不规则碰撞运动。

The idea in pollination is if an animal or the wind or whatever takes pollen from a stamen and deposits it on these stigmas, you can see some pollen grains dropped off here.

授粉的概念是，如果动物或风或其他什么东西从雄蕊中获取花粉，并将其沉积在这些柱头上，你可以看到这里掉下了一些花粉粒。

And one of these flies found in Spanish amber dating to 105 million years ago actually had a clump of pollen grains in the hairs on its back -- from an extinct gymnosperm plant.

在 1.05 亿年前的西班牙琥珀中发现的其中一只苍蝇实际上在其背部的毛发中有一团花粉粒——来自一种已灭绝的裸子植物。

And while it's hard to catch an insect in the act of pollinating, the fossil record gives us several lines of indirect evidence of pollination, like specialized plant structures, specialized insect mouthparts, and pollen grains.

虽然很难捕捉到正在授粉的昆虫，但化石记录为我们提供了几行授粉的间接证据，例如特殊的植物结构、特殊的昆虫口器和花粉粒。