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.

　　那么是酸性物質還是堿性物質好呢?酸性物質是指ph值在7以下的物質，數值越小，酸性越強，在一般的情況之下，酸性物質具有較為強烈的腐蝕性。而堿性物質是指ph值在七以上的物質，數值越大，堿性越強。無論是酸性物質還是堿性物質，他們在各自的領域都能夠發揮不同的作用，對于生活非常的重要，所以并沒有哪一個更好之說。我們在日常的生活之中，應該合理的利用酸性物質和堿性物質，以創造更高的價值，創建美好的生活。

　　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.

　　石膏粉是一種強酸強堿鹽，它不屬于酸性物質，也不屬于堿性物質。這種物質在日常生活中的應用非常廣泛，既可以作為食品加工品，也可以用來固定骨骼和肌肉，還可以作為建筑材料。我們在使用這種物質之前，應該了解它的性狀，以避免意外發生。

　　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.