反渗透反滲透

fǎn shèn tòu

Meaning

anti-infiltration (measures taken against subversive external forces); (chemistry) reverse osmosis

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Characters

反fǎnreverse, opposite; contrary, anti-厂又渗shènto seep, to permeate, to infiltrate氵参透tòuto pierce, to penetrate, to pass through; thorough辶秀