Polycysteine
[化] 聚胱氨酸
🗣️ 情景例句
Could you please say it again?
你能重复一下吗？
I should say you've caught a cold.
我看你感冒了。
Frank could hardly conceal his excitement, for he knew that he had made a real discovery.
弗兰克几乎无法掩饰自己兴奋的心情，因为他明白自己发现了一件珍品。