Etf
abbr. 交易型开放式指数基金（Exchange Traded Fund）；发动机试验设备（Engine Test Facilities）
🗣️ 情景例句
I grew up in Beijing, but I was in Los Angeles for two years.
我在北京长大，不过在洛杉矶已呆了两年。
I know the boy whose father is a manager.
我知道那个男孩的父亲是经理。
Give me a book please, Jane.
请拿本书给我，简。