The modular metro concept also offers an expansive range of dimensions that can be customized to specific operator requirements offering lower operational costs and easy maintenance and repair.
模块化的地铁概念还提供了一个广阔的尺寸范围，可定制，以提供具体的操作要求降低运营成本，易于保养和维修。
The theory has evolved to describe the relationship between finite groups, modular forms and vertex operator algebras.
理论已经逐步形成描述在有限群，标准化的形式和顶点算符代数之间的关系。
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