当磁场偏离势场或无力场时，将会产生场向电流，该电流与导管的强度和稳定维持密切相关。

When the magnetic field deviates from potential or force-free field, the field-aligned current can be produced, and it relates closely with the intensity and lifetime of ducts.

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结果表明，达到动力平衡时，河道中发育的床面结构越强，消耗水流能量越多，从而稳定维持的纵坡降越大，因此在一定程度上决定了河道纵剖面。

The results indicated that more intense streambed structure means greater stream power consumption and steeper channel slope when rivers are in dynamic equilibrium.

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毫无疑问，美国进口了大量的能源。而事实上，美国依靠这种稳定的流动来其维持经济。

There is no question that the United States imports a great deal of energy and, in fact, relies on that steady flow to maintain its economy.

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We've talked about one the main concepts in physiology being homeostasis, that is 'how do you maintain a constant internal environment?

我们讲到了生理学的主要概念,内稳态,即如何维持内环境的稳定

耶鲁公开课 - 生物医学工程探索课程节选

In order for life to proceed, you need to maintain a constant internal environment.

为了维持生命,人体的内环境需要保持稳定

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And sencondly to commit tens of thousands of troops to stabilise Afghnastan.

派出成千上万的军队来维持阿富汗的稳定。

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