The rocks around Austin are mostly limestone, but dolomite, clay, basalt, tuff, sandstones, and river gracel are also present.是什么意思_The rocks around Austin are mostly limestone, but dolomite, clay, basalt, tuff, sandstones, and river gracel are also present.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句