这个型号是单声道的。
这种型号是用两年时间制成的。
这种型号是价格和质量间的最佳折中方案。
This model represents the best compromise between price and quality.
The Hepatitis B vaccine I talked about before produced by recombinant DNA technologies, called Recombivax HB, that's one version of it.
我曾经提到过的通过DNA重组技术,制造的乙型肝炎疫苗,被称作重组乙型肝炎疫苗,那是该疫苗的型号之一
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