1. I had to delime the kettle because it was covered in limescale.
我不得不用脱钙剂清洁水壶，因为它被水垢覆盖了。
2. The dishwasher has a delime function to remove mineral deposits.
这台洗碗机有一个脱钙功能，可以去除矿物质沉积物。