Parastratigraphy
副地层学
🗣️ 情景例句
We were all sorry when we heard that your brother had had an accident.
我对你弟弟的意外感到遗憾。
Children enter school at the age of five,don't they?
孩子们在5岁时入学吗？
I'm his fan.
我是他的影迷。