Caseinum
酪蛋白
🗣️ 情景例句
This spring is the origin of the brook.
这泉水是那条小河的源头。
Children learn to creep ere they can go.
孩子要走路，先得学爬行。
Oh, hello, Jim. Glad to see you again. How are you?
啊，你好，吉姆。很高兴又见到你。你好吗？