Sciametry
[天]日月蚀的数学理论
🗣️ 情景例句
He treats everyone with courtesy.
他对待每一个人都很有礼貌。
To read without reflection is like eating without digestion.
学而不思，犹如食而不化。
John asked Grace to marry him，
约翰向格雷斯求婚。