Sciametry
[天]日月蚀的数学理论
🗣️ 情景例句
Nowadays many people go traveling for the holidays.
下面许多人都在假期里去度假。
We should weep for men at their birth and not a t their death.
我们应在人降生时流泪，而不该在人死亡时哭泣。
How long have you been learning English?
你学英语有多久了？