双股的

The features of the design approach are that the coupling function between water utilization network and heat exchange network is considered;in the first stage,the step-by-step double-linear programming method is employed for the design of water utilization network targeting both minimum water consumption and minimum energy loss,realizing the minimum water consumpt.

其特点是：考虑了用水网络和换热网络之间的耦合作用，在设计的第一阶段即用水网络设计阶段，以同时的用水量最小和火用损最小为目标采用逐步双线性规划法来设计用水网络，实现整个过程的用水最小化并为第二阶段的换热网络设计提供最合理的冷流和热流股以确保能量的合理利用；对于设计的第二阶段的换热网络设计，可直接采用文献中的方法。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。