其他的研究人员还发现血液中的神经生长因子（nerve growth factor，NGF）的等级也在增加。

Other researchers also found blood levels of nerve growth factor, or NGF, also increased.

youdao

其他的研究人员还发现血液中的神经生长因子（nerve growth factor，NGF）的等级也在增加。

Other researchers also found blood levels of nerve growth factor, or NGF, also increased.

youdao