迄今为止，还没有

• Any violation can result in punishment . the olympic guidelines allow for sanctioning them or taking legal action . no action to date has ever been taken against an athlete
  （运动员）一旦违背规定，他们就会受到惩罚。按规定，奥委会将考虑制裁或起诉他们。迄今为止，还没有一名运动员被起诉过。
• By far , there is n ' t any synthetic huperzine a whose activity is equal to that of the natural huperzine a . the amount of h . serrata in the whole of nature can hardly meet the demand of the market
  但迄今为止，还没有合成出其活性与天然石杉碱甲相当的化合物。而蛇足石杉的野生资源远不能满足市场需求。
• There is no complete visual programming environment by now . the popular visual programming languages , such as visual basic , visual c + + and delphi and etc . , are only oriental to visual program interfaces
  虽然visualbasic 、 visualc + +和delphi等面向程序界面可视化的程序设计语言已经十分流行，但迄今为止，还没有出现真正意义上的可视化编程环境。