而现有杀螨剂以化学杀螨剂为主，长期使用后不仅使害螨产生了抗药性，还严重威胁环境安全及人类健康。
The existing acaricides are mainly chemical acaricides and after long-term use it not only causes mites resistance, but also a serious threat to environmental safety and human health.
而现有杀螨剂以化学杀螨剂为主，长期使用后不仅使害螨产生了抗药性，还严重威胁环境安全及人类健康。
The existing acaricides are mainly chemical acaricides and after long-term use it not only causes mites resistance, but also a serious threat to environmental safety and human health.
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