说明：  TrueGrid?是一种功能强大、易学的网格生成软件，它可以方便快捷地生成优化的、高质量的、多块结构的六面体网格模型，非常适合为有限差分和有限元软件做前处理。
(TrueGrid is a powerful and easy to learn grid generation software. It can generate an optimized, high-quality and multi block hexahedral mesh model conveniently and quickly, which is very suitable for pre-processing of finite difference and finite element software.)