Poid
形心(曲线), 拟正弦线, 膺正弦线, 瞬心轨迹
🗣️ 情景例句
I owe you a good steak dinner.
我欠你一顿牛排晚餐。
Lots of people like stamp collecting.
许多人喜欢集邮。
His roots and mine bad become too firmly embedded in the new land.
因为他与我一样已经把根深深地扎在异国的土地上。