Dgps
差分GPS系统
🗣️ 情景例句
He's an extremist, and quite fanatical.
他是个极端分子，非常狂热。
I've got to be going now, Good-bye.
我得走了，再见。
We may have to back order three items on this order.
这次订的货有三个项目必须要晚点才能交货。