Zedeflon
四氟乙烯均聚物
🗣️ 情景例句
How shall I address you?
我该怎样称呼你？
How much is a call to the United states?
打一个电话到美国去需要多少钱？
The entrance to the cave is on a plateau in the Dauphine Alps.
此洞的洞口在丹芬阿尔卑斯山的高原上，