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。
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。
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