The social reason exists in their crossboundary maladjustment, role conflict and the absence of custody, society network and social support.
留守儿童的越界适应不良，角色冲突，以及社会支持网络的缺失是造成留守儿童心理问题的主要原因。
2
Next, in the interior of the patches, surface fitting points and crossboundary derivatives are estimated from the reference curves by constructing virtual iso-parametric curves.
其次，在曲面片内部，曲面拟合点和边界方向导数可以从参考曲线中通过构建虚拟等参线的方法得到。
3
We used JDBC to cross that boundary and connect to and invoke stored procedures in either Sybase or DB2.