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
Max thanks you.
Max谢谢你。
He was accustomed to poor food.
他习惯于粗茶淡饭。
I got up early and bought thirty-seven cards.
我早早起了床，买来了37张明信片。