Esiatron
静电聚集行波管
🗣️ 情景例句
You haven't changed much in fifty years.
你五十年来没有什么变。
To make it fast, you can send a fax.
要想快点的话就发个传真。
I can lend you one and a few pieces of equipment.
我可以借给你一顶帐篷和几样装备。