Barratron
非稳定波型磁控管(用以产生噪音干扰)
🗣️ 情景例句
Fifteen minutes! Thank you. Good-bye.
十五分钟 ！谢谢 。再见。
It has been a long time since last came here.
自从我上次来这里已经有很长时间了。
While two detectives were keeping guard at the door, two others opened the parcel.
这时两个侦探把住门口，另外两个侦探打开了包裹。