One way to resolve the error is to add a root element as part of the view definition. For example, you can define the following view on the Oracle data source.
解决此错误的一种方式是添加作为视图定义一部分的root元素。
The two sides of the operation must match (that is, if you have 2 element tuple as the pattern, the expression must resolve to a 2 element tuple).
操作的两边必须匹配（也就是说，如果模式是包含两个元素的元组，那么表达式的计算结果也必须是包含两个元素的元组）。
To resolve the problem of high sensitivity of the element of low inner resistance, we design the unsymmetric cross structure for the GaAs Hall sensor.
针对器件低内阻下的高灵敏度这一器件特性上的难题，在砷化镓霍尔传感器设计中采用非对称十字形结构。
The nonlinearity of soil should take into account, so the article adopts "initial-stress" finite element approach to resolve the coupling formulation.
考虑到土体的非线性性质，本文采用了弹塑性方法中的增量初应变法对耦合方程进行解答。
The nonlinearity of soil should take into account, so the article adopts "initial-stress" finite element approach to resolve the coupling formulation.
考虑到土体的非线性性质，本文采用了弹塑性方法中的增量初应变法对耦合方程进行解答。
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