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1.But bacteria living in and on the animals develop and become immune to the drugs.
immune to 对…免疫； 不受…感染； 不受影响的
Adults are often immune to German measles.
成人往往对风疹有免疫力。
Whilst Marc did gradually harden himself to the poverty, he did not become immune to the sight of death.
尽管马克逐渐对贫困现象无动于衷，但他对于死亡的惨象还是不免动容。
2.we're seeing that over a third of the industry at this point either has eliminated the use of medically-important antibiotics in its production
at this point 在此刻；在此地
At this point there were murmurings of approval from the experts.
在这一点上专家们低声赞同。
At this point Diana arrived.
这时候，戴安娜到了。
