Klystron
n. 调速管\\n[化] 速调管
🗣️ 情景例句
How long have you known her?
你认识她多久了？
9:25 on Track 12.
9点25分，12轨道。
and the profits from the exhibition were used to build museums and colleges.
博览会的赢利用来建造博物馆和高等学校。