但这些抗原很难培养，研究人员正努力解决这个问题，通过使用增强剂或佐剂。

But they can be difficult to culture and scientists have been trying to fix that by using boosters, or adjuvants.

youdao

但这些抗原很难培养，研究人员正努力解决这个问题，通过使用增强剂或佐剂。

But they can be difficult to culture and scientists have been trying to fix that by using boosters, or adjuvants.

youdao