one of four subclasses or superorders of Monocotyledones; comprises about 500 species in 14 families of aquatic and semi-aquatic herbs是什麼意思_one of four subclasses or superorders of Monocotyledones; comprises about 500 species in 14 families of aquatic and semi-aquatic herbs在線翻譯_英語_讀音_用法_例句