Vectron
超高频频谱分析仪
🗣️ 情景例句
I would prefer a non-smoking room.
我想要一间不许吸烟的房间。
What is the coldest region in this country?
这个国家最冷的地带是哪里？
The last creature to compete with man was the mosquito.
能与人竞争的生物最后只有蚊子了，