微(び)粒(りゅう)子(し) biryuushiは wa肉(にく)眼(がん) nikuganで deは waほとんど hotondo見(み)え()な()い() mienai。 Fine particles are barely visible to the naked eye. Literal Fine-particles [topic-は] naked-eye [by-では] almost not-visible. 微粒子 means 'fine particles.' 肉眼 means 'naked eye.' では marks the instrument/means. ほとんど見えない means 'almost invisible.' Scientific register. sciencecompound technical noun
微(び)粒(りゅう)子(し) biryuushiは wa肉(にく)眼(がん) nikuganで deは waほとんど hotondo見(み)え()な()い() mienai。 Fine particles are barely visible to the naked eye. Literal Fine-particles [topic-は] naked-eye [by-では] almost not-visible. 微粒子 means 'fine particles.' 肉眼 means 'naked eye.' では marks the instrument/means. ほとんど見えない means 'almost invisible.' Scientific register. sciencecompound technical noun