Sentron
防陰極回轟式磁控管(短波電子管), 防陰極反加熱式磁控管A-type sentron A型仙臺放電管
??? 情景例句
I would like to live somewhere near the university, or at least on a bus line.
我想住在大學附近，或者至少有公共汽車直達。
In the world, who knows not to swim goes to the bottom.
處世似游泳，不會即下沉。
We must conclude from the work of those who have studied the origin of life,
我們必須從那些研究生命起源的人的工作總結出：