Idf
abbr. 综合资料文件（intergrated Data File）
🗣️ 情景例句
You won't believe it, Grandpa,
你绝不会相信， 爷爷，
I bought it at half price.
我花了半价买来的。
Recent scientific evidence seems to indicate that this assumption is incorrect.
但近期科学研究发现，好像这种假设是不正确的。