However, for the composite load has the characteristics of complex composition, random time variance and spread over different area, its exact mathematics model is still not built up.
然而，系统中的综合负荷，由于具有构成复杂、随机时变、地域分散等特点，其准确的数学模型一直没有建立起来。
Mixture soil is a kind of the special soil, its complex in composition, a great disparity in size, a great change in mechanics quality.
“混合土”是一种特殊性土，成分复杂，粒径悬殊，力学性质变化较大。
In pervasive computing environment, a single service is very difficult to meet the user's task needs, so its need to use service composition to complete the complex tasks.
普适计算环境中的单一服务很难满足用户的任务需求，需要通过服务的组合来完成用户的复杂任务。
In pervasive computing environment, a single service is very difficult to meet the user's task needs, so its need to use service composition to complete the complex tasks.
普适计算环境中的单一服务很难满足用户的任务需求，需要通过服务的组合来完成用户的复杂任务。
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