求翻译：我有两个新同学，她们是kate和mary。她们都是12岁kate是美国人，又高又苗条。mary来自英国，瘦小而漂亮。她们都很有礼貌且乐于助人。我们都是好朋友。是什么意思？

I have two new students, they are kate and mary. They are 12-year-old kate American, tall and slim. mary from the United Kingdom, thin and beautiful. They are very polite and helpful. We are good friends.

I have two new students, and they are kate and Mary. They are both 12-year-old kate is the American people, and was high and slim. Mary from the UK, skinny and beautiful. They were all very polite and helpful. We are all good friends.

I have two new schoolmates, they are kate and mary.They all are 12 year old of kate are the American, also Gao You is slender.mary comes from England, is thin and small and is attractive.They all very much have politeness also are glad help the human.We all are the good friend.

I have two new students, who are Kate and Mary. They are 12 years old Kate is American, tall and slim. Mary comes from United Kingdom, thin and beautiful. They were very polite and helpful. We are all good friends.

正在翻译，请等待...