Now in the laboratory, if you take a clam and you put it in the pH that is -- not 8.1, which is the normal pH of seawater -- but 7.5, it dissolves in about three days.
现在在实验室里， 你把一个蛤蜊放到PH值 不是正常海水PH值 8.1的水里-- 而是7.5的水里， 它在约三天里就溶解了。