You must take penicillin injections and stay in bed. 你必須注射青霉素和臥床休息。
Farmers often give penicillin to beef and living animals, and because of this, penicillin has been found in the milk of treated cows. 農民常給肉牛和其他動(dòng)物注射青霉素，正因如此，人們在用青霉素治療過(guò)的病牛的牛奶中發(fā)現了青霉素。
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