Poid
形心(曲线), 拟正弦线, 膺正弦线, 瞬心轨迹
🗣️ 情景例句
--and speaking of Max--I hear the car.
谈到小孩，我听见汽车声了。
Let me get back to you.
我过一会儿打给你吧。
Mr. And Mrs. Green have stockings, too.
格林先生和格林夫人也有长统袜。