Proconvertin
(血清凝血酶原)转变加速因子前体
🗣️ 情景例句
You should use 'officer' to address a policeman.
你应该用 'officer' 来称呼警察。
She was fully equipped for the climbing.
她装备齐全，准备登山。
What are you going to buy?
你打算买什么？