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
Oh, it's not finished yet,
噢！它尚未完成。
To mention the wolf's name is to see the same.
说到曹操，曹操就到。
The sun comes up in the east.
太阳从东方升起。