At the depth of 50 cm, there appears to be large amounts of cement, rocks and piles of red bricks belonging to a secondary sedimentary layer.是什么意思_At the depth of 50 cm, there appears to be large amounts of cement, rocks and piles of red bricks belonging to a secondary sedimentary layer.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句