Lactamine
丙氨酸
🗣️ 情景例句
Could you tell me some more about...?
你能告诉我其它关于…的事吗？
What shall I send him for his birthday?
我要送他什么东西作为生日礼物？
No, not exactly. But later, peole developed a way of printing, using rocks.
不完全是这样。但后来，人们利用石头，研制了一种印刷方法。