Ultron
波导耦合正交场放大管
🗣️ 情景例句
It's a bonsai tree for your new apartment.
这是一颗盆栽，祝贺你迁新居。
He who has not tasted bitter knows not what sweet is.
不吃苦中苦，哪知甜中甜。
Please stop me if you have any question.
有任何问题，请随时叫我停下来。