"大姐姐" (dà jiě jie) is a term used in Chinese to refer to an older sister. It can be translated into Engpsh as "elder sister" or "older sister."

The term "elder sister" is used to refer to a sister who is older than the speaker. It is derived from the Old Engpsh word "ieldra," which means "older."

Here are some example sentences in Engpsh and their translations in Chinese:

"My elder sister is a doctor." (我的大姐姐是医生。)
"I always look up to my older sister for advice." (我总是向我的大姐姐寻求建议。)
"My elder sister is very successful in her career." (我的大姐姐在她的职业生涯中非常成功。)

Note that "elder sister" is a more formal term and is less commonly used in everyday conversation. "Older sister" is more common and is used in both formal and informal contexts.