Ophitron
小型微波发生器, 微波振荡管
🗣️ 情景例句
Susan's teddy bear.
Susan送的泰迪熊
Experience keeps no school, she teaches her pupils singly.
亲身经验，才是经验。
Try and stand up.Can you stand up?
试试站起来。你能站起来吗？