Dsf
abbr. 色散移位光纤（Dispersion Shifted Fiber）；个人金融理财业务（direct sales force）
🗣️ 情景例句
But somehow I got my days mixed up and didn't realize the mistake until now.
可是不知道怎么回事，我把日期弄错了，而且到现在才知道这个错误。
Do you have your driver's license?
你有驾驶执照吗？
but favourite eating varieties like cod and skate which grow to unnatural sizes,
而是深受人们喜爱的食用鱼品种，如鳕鱼和鳐鱼，只不过它们长得出奇地大，