Quadratron
热阴极四极管
🗣️ 情景例句
Can you give me a little deal on this?
这能卖得便宜一点吗？
All products have to pass strict inspection before they go out.
所有产品出厂前必须要经过严格检查。
The operation, which lasted for over four hours, proved to be very difficult because of the hard resin which covered the skin.
手术持续了4个多小时，非常难做，因为皮肤上覆盖着一层硬硬的树脂。