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
I really mean it.
当然是真的。
She was distinguished for her scientific achievements.
她因其科学成就而闻名。
It seems all right.
看来这没问题。