Or it could be that these very small particles actually enter the blood stream through vessels in the lung, and then begin affecting blood vessels throughout the body.

或许是这些非常小的颗粒物确实通过肺部血管进入血流，然后开始影响全身血管。

youdao

And these molecules would interact with these very small and light particles and so the light particles would never make it to the bottom.

同时液体分子又会，与微小的颗粒相互作用，所以微小颗粒，不会沉到底部。

youdao

A third group believed that matter was made up of very tiny particles which were too small to be seen. These particles were so small that they could never be further divided into smaller particles.

第三派认为物质是由极其微小、小得看不见的粒子组成的，而且这些粒子小到再也不能分割成更小的粒子了。

youdao

The trick here is that these particles are very, very small, which means they're essentially all surface.

BBC: Millions of Bangladeshis are forced to drink unsafe water