Empretron
汞弧离子管
🗣️ 情景例句
With your background and experience,
依你的背景和经验，
Don't worry, leave everything to me.
你不必担心，一切还有我哪！
Five days ago, the policeman told him, the bicycle was picked up in a small village four hundred miles away.
那位警察对他说，那辆自行车是5天前在400英里外的一个小村里发现的，