1. The degree of secrecy naturally varies considerably.
    保密程度自然差别很大。

2. Yet a great many processes depending on such research are sought for with complete secrecy until the stage at which patents can be taken out.
    然而，依赖这种研究的很多工艺程序是在完全保密的情况下进行的，直到可以取得专利权的阶段为止。

3. Secrecy is important to ousr plans.
    保密对于我们的计划至为重要.

4. 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。

5. One is the general atmosphere of secrecy in which it is carried out,
    一是科研工作中普遍存在的保密气氛；