Yes, we have done a little. But we have just started and have nothing to show you.
有,我们做了一些,但是因为我们才刚起步,并没有任何资料可以提供给你们。
Sometimes the secrecy goes to such an extent that the whole nature of the research cannot be mentioned.
有时,保密竟达到了这样的程度,即连研究工作的整个性质都不准提及。