A guided walking tour of the grounds includes an informative greenhouse exhibit of plants that have been useful to humans as well as detailed information on the materials used in Biosphere 2 and its construction.是什么意思_A guided walking tour of the grounds includes an informative greenhouse exhibit of plants that have been useful to humans as well as detailed information on the materials used in Biosphere 2 and its construction.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句