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 didn't think of that. Thanks.
我倒没有想到这个法子。谢了。
Shut up!
闭嘴！
and the more difficult it is, the more highly it is regarded.
他们认为， 道路愈艰险愈带劲儿。