显而易见，全局变量可以做同样的工作，但它们带来了大家熟知的全局性名称空间污染的问题，并会因非局部性而引起错误。
Obviously, global variables could do the same job, but they cause the familiar problems with pollution of the global namespace, and allow mistakes due to non-locality.
在产品可能受到污染的区域，需要制定使用非渗透性的手套，发网，帽子，须套以及限制饮食，喝水，吸烟等的程序。
Procedures for use of impermeable gloves, hairnets, caps, beard covers, etc. and for restrictions on use of food, drinks, tobacco, etc. in areas whereby product contamination could occur.
计算结果表明，数值模拟方法能够合理地描述非水相流体的运移过程和污染特征。土体渗透性和污染物残余饱和度是其重要影响因素。
Numerical results show that the contamination characteristics of NAPLs can be reasonably described, which is significantly affected by intrinsic permeability of soils and residual saturation of NAPLs.
应用推荐