noun 下载 🔗分享 水垢,石灰垢。 A white, chalky deposit of calcium carbonate found in kettles, washing machines etc., especially in a hard water area. Examples : "The electric kettle stopped working because thick limescale had built up inside. " 因为电热水壶内部积了厚厚的一层水垢,所以它坏了,不能用了。 substance material chemistry utility 与AI对话词汇游戏阅读练习