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
Frankly,
坦白地说，
Children enter primary school at the age of 7.
孩子们7岁进小学。
Since then, they have been trying to find out how the fire began.
从那时起，他们一直试图找出起火的原因。