Pacteron
铁碳磷母合金
🗣️ 情景例句
You've got the facts wrong.
你把事实搞错了。
Do you want to airmail it or not?
你想发航空信吗？
since ground stations and satellites cannot see everywhere.
因为地面工作站和卫星不可能看到地球上的每一个地方。