Pool-cathode tube
[电] 汞弧管
🧩 词语组成解析
pool
[pul]
n. 水池;石油层;（液体等的）一滩;共同储金;
vi. 使形成池塘或水洼;淤积;合伙经营;采（煤等）;
cathode
[['kæθəud]]
n. 阴极\\n[化] 阴极
🗣️ 情景例句
This is a good deal: buy 1, get 1 free.
这可是个好买卖：买一送一。
I told him to come in and rest for a while.
我告诉他进来休息一下。
A sound made by tapping on the hull of a ship will be reflected from the sea bottom,
敲打船体所发了的声音会从海底传回来，