例句與造句

1. Constitutive expression of class ii mhc is restricted to " professional " antigen - presenting cells but can be induced on various tissues by gamma interferon
   Mhc -類的組成型表達(dá)僅限于“專職性”抗原提呈細(xì)胞，但細(xì)胞因子如ifn -可引起誘導(dǎo)型類分子表達(dá)。
2. It's difficult to find gamma interferon in a sentence. 用gamma interferon造句挺難的