Pco
[医][=platelet cyclo-oxygenase]血小板环化（加）氧酶
🗣️ 情景例句
I'm afraid not. We don't generally accept a letter of credit.
恐怕不行，我们一般不采用信用卡。
I'd like to sit in the front of the plane.
我要坐在飞机前部
Yes, I'm afraid I do.I may come later.
是的，恐怕我必须做。我可以晚一点去。