Sera
浆液, 血清\\n[医] 血清; 浆液
🗣️ 情景例句
I'm a foreign student, and I'd like to make some new friends.
我是个外国学生， 我想交几个新朋友。
He knocks boldly at the door who brings good news.
彼叩门声响，必来报佳音。
Last year, however, it came into use.
然而去年机场开始使用了。