Polytef
[化] 聚四氟乙烯
🗣️ 情景例句
and Mom has all these committees she's on.
妈妈又有那么多的小组会议要开。
Has this seat number started boarding?
这个座位号已开始登机了吗？
My teacher's gifted instruction lived on after her death.
我的教师逝世后，她宝贵的教诲仍继续长存。