单词：potassium ion
potassium ion的用法和样例：
例句
- In this case, the ion is potassium.这里的离子指的是钾离子。
- Calcium is also necessary to prevent leakage of potassium during the aging of beet slices.甜菜薄片衰老时期，钙对于防止钾离子丧失，也极其必要。
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