Gypsum powder is a kind of strong acid and strong alkali salt. It belongs to a neutral substance instead of an acidic substance or an alkaline substance. This substance can dissolve in water and form a neutral solution. Gypsum powder is very powerful and has good fixity, so it is widely used in daily life. It can fix the muscles and bones of patients, it can also be used as building materials, and it can also be used for food processing. Before we use gypsum powder, we must pay close attention to the properties of gypsum powder, so as to make it play the greatest role.

　　那么是酸性物质还是碱性物质好呢?酸性物质是指ph值在7以下的物质，数值越小，酸性越强，在一般的情况之下，酸性物质具有较为强烈的腐蚀性。而碱性物质是指ph值在七以上的物质，数值越大，碱性越强。无论是酸性物质还是碱性物质，他们在各自的领域都能够发挥不同的作用，对于生活非常的重要，所以并没有哪一个更好之说。我们在日常的生活之中，应该合理的利用酸性物质和碱性物质，以创造更高的价值，创建美好的生活。

　　So is acidic substance or alkaline substance better? Acidic substance refers to the substance whose pH value is below 7. The smaller the value, the stronger the acidity. Under general circumstances, acidic substance has stronger corrosiveness. The alkaline substance refers to the substance whose pH value is above 7. The greater the value, the stronger the alkalinity. Whether acidic or alkaline substances, they can play different roles in their respective fields, which is very important for life, so there is no better saying. In our daily life, we should make rational use of acidic and alkaline substances in order to create higher value and create a better life.

　　石膏粉是一种强酸强碱盐，它不属于酸性物质，也不属于碱性物质。这种物质在日常生活中的应用非常广泛，既可以作为食品加工品，也可以用来固定骨骼和肌肉，还可以作为建筑材料。我们在使用这种物质之前，应该了解它的性状，以避免意外发生。

　　Gypsum powder is a kind of strong acid and alkali salt. It does not belong to acidic substance or alkaline substance. This substance is widely used in daily life. It can be used not only as food processing products, but also as bone and muscle fixation, as well as as as as building materials. Before we use this substance, we should know its properties in order to avoid accidents.