Valve tubes
[醫] 真空整流管
?? 詞語組成解析
valve
[v?lv]
n. 閥;真空管;（管樂器的）活栓;（心臟的）瓣膜;
vt. 裝閥于;以活門調節;
n. 管子, 導管；管狀蟲；倫敦地鐵（tube的復數）
??? 情景例句
What time can you send one over?
那你們什么時候能派人來呢？
Every potter praises his own pot.
老王賣瓜，自賣自夸。
Because the gravity on the Moon's surface is only a sixth of Earth's
由于月球表面的重力僅是地球表面的1/6-