4.现在讲第四个问题。从这些国内外例子,我个人想法预研工作应该怎么干呢?可以说有那么四个原则。 第一,选题。这是很重要的。选题应该对准目标,模清情况,选好课题,达到可用性尽量大,即使不能100％,但大部分是适合我们用的,风险性比较小。因为我们不可能有很多钱来搞,我们本来就穷,不能够象美国一样,他 Now let’s talk about the fourth question. From these examples at home and abroad, my personal opinion should be how to do pre-research work. There are four principles to be said. First, the topic. This is very important. The topics should aim at, clear the situation, select the subject, to achieve the greatest possible availability, even if not 100%, but most are suitable for our use, the risk is relatively small. Because we can not have a lot of money to engage in, we would have been poor, not like the United States, he