自来水中的沉淀物会沉淀在你的脸上。
The tap water has deposits when tend to take a toll on your face drying it out.
在被淹没的金属表面积累的海洋有机体沉淀物。污垢也指热交换器管子上积累的无机物沉淀物。
An accumulation of Marine organism deposits on a submerged metal surface. Fouling also refers to the accumulation of normally inorganic deposits on heat exchanger tubing.
我们把过量的二氧化碳通入石灰水时，白色沉淀物会消失，因为沉淀物反应生成可溶于水的碳酸氢钙。
When we pass an excess of carbon dioxide into the limewater, the white precipitate disappears. This is because the precipitate dissolves to form soluble calcium hydrogencarbonate.
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