Karst
n. 喀斯特(区)
🗣️ 情景例句
Look in the real-estate section of Sunday's Times.
查一查星期天的 纽约时报 房地产版。
Children enter school at the age of five,don't they?
孩子们在5岁时入学吗？
No, I think it'll be all right for him to go to school.
不，我想他去上学没什么关系。