Nbcs
[医][=newborn calf serum]新生牛血清
🗣️ 情景例句
You pay there. I have the next group to go down. I'll see you soon then.
你在那儿付钱。我带的下一个团就是要下去的。回见！
Knowledge is a treasure, but practice is the key to it.
知识是一座宝库，实践是打开宝库的钥匙。
He thinks himself somebody, but we think him nobody.
他自以为是重要人物，但我们觉得他什么也不是。