病原体必须逃过宿主免疫系统的重重防御，直至能够在宿主细胞内复制及扩散到其它细胞中，才算侵染成功。

To be successful, a pathogen must escape the many defenses of the host immune system until it can replicate and spread to another host.

youdao

在无反应发生条件下进行固定化细胞内组分有效扩散系数测定时，常常要使细胞失去活性。

There exist different methods of inactivating cells which give a non-reaction-occurring condition under which the effective diffusivity of a substrate in the immobilized cell matrix is often measured.

youdao

在无反应发生条件下进行固定化细胞内组分有效扩散系数测定时，常常要使细胞失去活性。

There exist different methods of inactivating cells which give a non-reaction-occurring condition under which the effective diffusivity of a substrate in the immobilized cell matrix is often measured.

youdao