Helicidin
螺杀菌素
🗣️ 情景例句
I cannot forgive myself for not seeing my mother when she was sick in bed.
母亲病的时候我没能去看她，为这件事我永远不能原谅我自己。
I have a toothache.
我牙好痛。
You're working hard, George.
你干得真辛苦，乔治。