而骨骼提取物也符合四环素等化学特征——这一证据表明这种抗生素是在儿童成长过程中沉积于骨骼里的。
And this bone extract also matched the chemical signature of tetracycline — evidence that the antibiotic was built into the kid's bones as he grew.
换而言之,化学家们希望打破病原体针对抗生素的联合防御。
In particular, they hope to break down the collective defence against antibiotics.
主要的污染物是动物粪便、抗生素和激素、制革厂的化学品、用于饲料作物的化肥和杀虫剂。
The major polluting agents are animal wastes, antibiotics and hormones, chemicals from tanneries, fertilizers and the pesticides used to spray feed crops.
Antibiotics are chemicals, usually small organic molecules that will kill micro-organisms like bacteria.
抗生素是一类化学物质,它们通常是小分子有机物,能够杀死细菌这样的微生物
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