Eumelanin
真黑素
🗣️ 情景例句
It's certainly a pleasure to meet you.
认识你真是我的荣幸。
And trade terminology in English is helpful in actual business negotiations.
对于实际的商务谈判是非常有用的。
The doctors have not yet decided how the woman died.
医生们至今还未确定这位妇女的死因。