harmful substance
英
美
- 有害物质
双语例句
- They were trying to remove harmful substances from the soil.
他们正设法去除土壤里的有害物质。 - It can effectively improve air quality by releasing the fresh air to purify the indoor air and adsorb harmful substance.
排放清新空气以净化室内空气，吸附有害物质，有效地提高空气质量。
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