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
Apply as much force as is necessary.
需用多少力量就用多少。
False tongue will hardly speak truth.
虚伪者不肯说真话。
We like the same music, the same food and the same books.
我们喜欢同样的音乐，同样的食物和同样的书籍。