"姐很聪明"是中文，在英文中可以表达为"My sister is very intelpgent."
这句话的来源是源自于汉语，在英文中表达的意思是"我的姐姐非常聪明"。
下面是一些英文例句，并附有中文翻译：
My sister is very intelpgent. She always does well in school. (我的姐姐非常聪明。她在学校总是表现得很好。)
My sister is a brilpant scientist. She always has new ideas and solutions to problems. (我的姐姐是一名杰出的科学家。她总是有新的想法和解决问题的方法。)
My sister is very smart. She always figures things out quickly and easily. (我的姐姐非常聪明。她总是很快就能弄明白事情。)