Travertine layers trapped abundant remains of aquatic algae, diatoms, mosses and larger marsh plants that grew in and along the canals.是什么意思_Travertine layers trapped abundant remains of aquatic algae, diatoms, mosses and larger marsh plants that grew in and along the canals.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句