The walls of some algae differ, e.g. the silica boxes enclosing diatoms, and the calcareous layer on the cell walls of calcareous algae.是什么意思_The walls of some algae differ, e.g. the silica boxes enclosing diatoms, and the calcareous layer on the cell walls of calcareous algae.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句