Alphatron
α粒子电离压强计, α射线管
🗣️ 情景例句
You are in great condition. I can't believe it!
你的身体太好啦。我简直不敢相信。
Take time for deliberation; hste spoils everything.
要费时思考，急躁会坏事。
What will be the population of these countries in the year 2000?
2000年不太发达国家的人口将是多少？