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在完全低于300mm时，由于“拒绝”，测试被停止，装置驱动已经完成了必须测量和记录的渗透数量（例如64mm内100次写入）。系统页表（SPT）“拒绝”的定义是：当渗透75mm需要的写入次数超过25。 解释blow：对可编程只读存储器(PROM)或其变种(如EPROM)进行写入的过程。 解释penetrate：在数据保密学中,对一个计算机系统的安全性的攻击,用以测试安全的有效性及暴露弱点。

First of all,the first part of the ariticle gives a brief description of the concept of biological diversity and the natural world and human society in some of the value. The second part, through the perspective of genetics, biotechnology and genetic variation analysis of the aspects of the natural biological diversity. The third part,it mentiones in a brief description about the concept of biological resources and their current direction of the study and hot issues. The fourth,mianly introduces through the cross breeding, mutation breeding, genetic engineering, cell engineering,4 different angles to clarify the current common way or methods of human creation,collection, use of biological resources. Part V, gives a brief description of the current problems of the biological resources faced by mankind and the protection plan.