Sepcete
薄膜型液相色谱填充剂
🗣️ 情景例句
I can't put it strongly enouth, I need to make a sale before the end of the week.
我郑重宣布，我要在本周末前搞一次大减价。
Which country do you come from?
你从哪一个国家来？
It is one of the most unpleasant discoveries which we all make that we must decline in this way,
人人必然会衰老。