Ppf
[医][=pellagra preventive factor]抗糙皮病因子，维生素pp
🗣️ 情景例句
My qualifications and experience perfectly match what you are looking for.
我具备的资格及经验完全符合你们的需求。
What is wealth good for,If it brings melancholy?
财富如带忧郁来，有了财富有何用？
but we found that it traced its way through the trees.
没想到它到树林中继续向前延伸。