Sepharose
琼脂糖(凝胶)
🗣️ 情景例句
They gave a banquet in honor of the delegation.
他们设宴招待代表团。
How long have you studied English?
你学英语多久了？
Three quarters of the world's books and newspapers are written in English.
3/4的书籍和报纸是用英语写的。