評論
打印
Acid
酸
Why does the lemon taste sour?
為什么檸檬的味道很酸？
It is because of the acid in a lemon.
因為檸檬里有酸。
Then what is acid?
那么什么是酸？
All substances with a sour taste are kinds of acid.
所有帶酸味的物質都是酸。
Vinegars, some fruits and car batteries have some acid.
醋，一些水果和汽車電池都有一些酸。
Acid can burn other substances when it meets them.
酸遇到其他物質時可以燃燒。
So you have to be careful when you use strong acid, because it can burn your skin.
所以你在使用強酸時要小心，因為它會灼傷你的皮膚。
Acid is important for people's health.
酸對人們的健康很重要。
Some acid plays an important role in cell maintenance and repair.
一些酸在細胞的維護和修復中起著重要的作用。
And the formation of red and white blood cells.
它對紅血球和白細胞的形成也有作用。
