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。
Apart from the secondary water supply systems, the drainage systems and the air-raid shelters, no significant difference was found in the positive rates between the central area and the marginal area.
除二次供水、市政排水设施和防空洞外，中心城区与边缘城区蚊孳生阳性率无明显差别。
Apart from the secondary water supply systems, the drainage systems and the air-raid shelters, no significant difference was found in the positive rates between the central area and the marginal area.
除二次供水、市政排水设施和防空洞外，中心城区与边缘城区蚊孳生阳性率无明显差别。
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