Etf
abbr. 交易型開放式指數基金（Exchange Traded Fund）；發動機試驗設備（Engine Test Facilities）
??? 情景例句
You get one point for each letter,
一個字母可得一分。
My thesis is due the same week as midterms.
畢業論文截止的日期，和期中考試那一周重復。
It looks as if she's gone away for a few days.
好象她要外出好幾天了。