Tyratron
电子管
🗣️ 情景例句
Can you give me a little deal on this?
这能卖得便宜一点吗？
OK. You'll have to use a credit card or leave a $100 deposit.
好。你必须使用信用卡，否则要付100美元的押金。
His talk covered many subjects.
他的报告涉及很多课题。