Negative ion is called "longevity element", which is a natural cleaner of the air and vitamin in the air.

负离子被称为“长寿素”，是空气中的自然清洁白器或空气中的维他命。

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Negative ion is called "longevity element", which is a natural cleaner of the air and vitamin in the air.

负离子被称为“长寿素”，是空气中的自然清洁白器或空气中的维他命。

youdao