Zedeflon
四氟乙烯均聚物
🗣️ 情景例句
What university are you attending?
你现在就读于哪所大学？
The fire is the test of gold; adversity of strong man.
烈火试真金，困苦练壮士。
If he had not broken his tooth, he would not be in hospital now.
如果他没有把牙齿弄坏，现在就不在医院了。