当ast构建好，我们确定表达式在语法上是有效的，并且在提供了正确的上下文时将可以执行。
When the AST is ready, we are sure that the expression is syntactically valid and can be executed providing the right context.
利用土体与衬砌结构之间的连续性条件和衬砌结构内边界上的边界条件，确定表达式的未知系数。
By utilizing the inner boundary condition of the lining structure and the continuity conditions between the soil and the lining, the unknown coefficients in the expressions are determined.
存储策略筛选器用于检查候选存储区域的属性，确定哪些存储区域满足筛选器表达式。
Storage policy filters are used to examine the properties of candidate storage areas, and to determine which storage areas satisfy the filter expression.
应用推荐