zero-g period

According to the Zero-growth theory of Library collection, this paper approaches the retention period about the back number of periodicals in library.

摘要本文依据“藏书零增长理论”对图书馆过期期刊的保存期问题进行探讨。

The relations between the pictures and 9 earthquakes Ms> 5.0 which occurred in and around the area during the measurement period are studied too. The earthquakes occurred nearby the zero lines of gravity anomalies.

测区及其周边共发生了9次Ms＞5.0级地震，地震发生在正负异常区变换带的零线附近；

Modern society, the rapid development of technological civilization, but also makes exorcise once become a" lost civilization", even in a very long period of time can only be charged to zero in some villages to see some of its broken miniature.

现代社会科技文明的飞速发展，更使得傩舞曾一度成为了一种失落的文明，乃至在很长的一段时间里都只能在部分村落中支零破碎地看到一些它的缩影。

19 over this period the correlation between the returns on the two stocks was approximately zero.

这一时段期间两支股票回报率之间的相关系数接近于零。

Dendrometer measurement showed a mean annual diameter growth of 0.074cm ( increment percentage 0.57%) in a 5 year period, with 17.6% of the individuals measured with dendrometers presenting zero or negative growth during this period.

测树器测得立木5a的年平均直径生长量为0.074cm，5年期间测得有17.6%的个体直径为零增长或负增长。