从InformixSYSCHUNKS系统表中读数据，并根据以下标准包括镜像块。
Read data from the Informix SYSCHUNKS system table and include mirror chunks according to this criteria.
RAND _ LOOKUP，随机查找函数，该函数根据作为查找表中下标的随机数从查找表中选择目标列的值。
RAND_LOOKUP, a random lookup function that selects a value for the destination column from a lookup table based on a random number as the subscript in the lookup table.
客户端表可按以下标准排序。
如果通过连接传递一个表，使用哪个更优-下标或者索引？
If you were passing a table via linkage, which is preferable - a subscript or an index?
读写前一步长下的时间在表5.2.1里的宏中加入下标_M1就可以得到前一次步长时间下（t-⊿t）的变量的值。
The M1 suffix can be generally applied to the macros in Table 5.2.1 to allow access to the value of the variable at the previous time step (i. e.
读写前一步长下的时间在表5.2.1里的宏中加入下标_M1就可以得到前一次步长时间下（t-⊿t）的变量的值。
The M1 suffix can be generally applied to the macros in Table 5.2.1 to allow access to the value of the variable at the previous time step (i. e.
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