Zedeflon
四氟乙烯均聚物
🗣️ 情景例句
You should take the number 1 subway.
应当搭一路地铁。
Tom's been feeling blue ever since his divorce.
自离婚以来，汤姆一直很忧郁。
We have a problem with your order.
你订的货有点问题。