运行的程序将对清单 1 中的表达式进行二次求值，其中 $exp 变量分别被设置为 和 。
The running program will evaluate the expression in Listing 1 twice, with the $exp variable set to and .
在互易原理的基础上，得到了计入相邻目标二次散射的散射场的积分表达式。
The integral expressions for scattered fields including the second-order scattering terms are given based on the reciprocity theorem.
本文利用统计学中线性模型的理论给出一类等式约束二次规划问题解的表达式。
In this paper, using the theories of linear model in the statistics, we can give the general expression on solution of a class of equality constrained quadratic programs problem.
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