Sepcete
薄膜型液相色谱填充剂
🗣️ 情景例句
How many people are there in your family?
你家里有几口人？
What? Already? Won't you have more coffee?
怎么，已经要走了？要不要再喝点咖啡？
What's the weather going to be like at the weekend?
周末的天气怎样？