A few years later, penicillin was being mass-produced and helping to save the lives of millions.
A few years later, penicillin was being mass-produced and helping to save the lives of millions.
若干年后，青霉素被大规模生产，帮助挽救了成百万人的生命。
A few years later, penicillin was being mass-produced and helping to save the lives of millions.
若干年后，青霉素被大规模生产，帮助挽救了成百万人的生命。