Serrasoid
锯齿波(调制)
🗣️ 情景例句
How much do you want for this?
这件东西你想卖多少钱？
This offer is firm subject to your acceptance reaching us not later than December 15.
此报盘为实盘，但以我方在12月15日前收到你方答复为准。
I saw him playing football on the playground.
我看见他在操场上踢足球。