Empretron
汞弧离子管
🗣️ 情景例句
Good morning, Mr. Tao.
早上好，陶先生。
Fine feathers do not make fine birds.
人不可貌相。
With a stopwatch, they counted how many times the bees repeated the dance during one minute.
他们用秒表记录蜜蜂在一分钟内重复舞蹈的次数。