Ppf
[医][=pellagra preventive factor]抗糙皮病因子，维生素pp
🗣️ 情景例句
I don't think you're the right person for me.
我觉得咱们不合适。
The telepnone is out of order.
这电话出毛病了。
and particularly by a new consciousness of the philosophical undercurrents in the scientific revolution,
尤其是以科学革命中哲学潜流的新意识为依据，