科学家们对于人体使用酶疗法持谨慎态度。
The scientists are cautious about using enzyme therapy on humans.
通过敲除这种能够产生酶的基因，科学家认为他们可以通过阻止雌性老鼠大脑过滤掉激素，使雌性老鼠受到额外的雌激素的影响。
By deleting the enzyme-producing gene, the scientists believe that they caused the female mice to be exposed to extra oestrogen, by preventing their brains from filtering out the hormone.
与此同时，生物学家们使用了酶与细菌来完成此项工作。
Biologists, meanwhile, have recruited enzymes and microbes to do the job.
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