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
Then you have to fill out this form
然后你要填写这份表格，
That is why we have asked you to come tonight.
这也就是我们今晚请你们来的原因。
'I was just wondering how to spend the morning -- until I saw you.
“我正不知道怎么消磨这一上午呢，正好见到好。