Salt and acid toughen the skins, which can making cooking time much longer.
加盐和酸能强化豆皮，可以使烹饪的时间更长。
2
When a dish seems to be lacking something and you've already seasoned it with salt, sometimes what's missing is acid.
当一道菜看似来似乎缺少某些东西时，而你已经用盐来调过味了，有时候你缺少的是一些酸。
3
In here, in solution you have all these molecules of solvent, molecules of salt, molecules of acid, or whatever, pH that are going to be around to buffer the pH.