Traditional engineering systems have a significant marginal cost.
传统工程系统有着显著的边界成本。
Recently installed systems tend to have excess capacity, and since the immediate marginal costs of using them seem to be negligible, management often encourages new uses.
最近安装的系统倾向于有超量能力的趋势，而由于使用它们的即时边际成本似乎可以忽略不计，管理层常鼓励新的使用。
With the uplift of marginal mountains, three foreland basin systems were formed in Juggar basin.
随着周缘界山的隆升，准噶尔盆地形成三大前陆盆地系统。
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