Expose the surface of the ocean to an atmosphere with ever more carbon dioxide, and the gas and waters will produce carbonicacid, lowering ph on a planetary scale.
要是海洋的表面与含更高二氧化碳的大气层接触，那么水和气会产生更多的碳酸，在全球范围内降低PH值。
2
The ore was heated in the kilns to drive off water and carbonicacidgas.
矿石被放入窑里加热，蒸发掉水和碳酸气。
3
Also eat some fruits, milk and a small amount of soft drinks containing carbonicacidgas.