Graface
石墨-二硫化钼固体润滑剂
🗣️ 情景例句
Is this your first trip to China?
这是你第一次到中国吗？
Can you tell one from the other?
你能区别哪个是哪个吗？
The more you order, the more you will save.
订购愈多，省的钱愈多