illuviation.Before l, in- is usually assimilated to il-, before r to ir-, and before b, m, and p to im-.是什么意思_illuviation.Before l, in- is usually assimilated to il-, before r to ir-, and before b, m, and p to im-.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句