Hardness ions
[化] (水的)硬度离子(指水中的钙、镁等离子)
🧩 词语组成解析
hardness
['hɑrdnɪs]
n. 坚硬;<物>硬性;困难;冷酷;
n. 离子（ion复数）
🗣️ 情景例句
How nice to meet you.
认识你真高兴。
All asses wag their ears.
傻子总爱装聪明。
Hans returned to his family home, but the house had been bombed and no one in the neighbourhood knew what had become of the inhabitants.
汉斯重返故里，但他的家已被炸毁，左邻右舍谁也不知原住户的下落，