But increasingly these remedies do not work. Scientists say that's because lice have developed tolerance and even resistance to chemicals.
但是这些药物逐渐失去效果。科学家表示,这是因为虱子产生了耐力,甚至能够抵抗这些化学药物。
单词 | resistance to chemicals |
例句 |
原声例句
VOA Standard 2015年8月合集 But increasingly these remedies do not work. Scientists say that's because lice have developed tolerance and even resistance to chemicals. 但是这些药物逐渐失去效果。科学家表示,这是因为虱子产生了耐力,甚至能够抵抗这些化学药物。 |
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