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
He has realized how precious health is.
他已经体会到健康的可贵。
I didn't do it on purpose.
我不是故意的。
I'm not sure. Maybe I'll give her some flowers. What about you?
我还不太肯定。也许我送她一些花儿。你呢？