Because of the importance of nutrients and their scarcity, nutrient recycling is one of the most significant eco-system processes that we'll cover in this course.

由于养分的重要性和贫乏性，营养循环是我们在这门课中会讲到的最重要的生态系统过程之一。

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So, in principle, you can determine for each one of those stars the velocity in orbit, the radius of their orbit and, of course, the period of the binary system.

所以从原则上来说，你们可以决定任何,恒星在轨道中的速度，轨道的半径以及，当然，二元体系的周期。

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Chart 1 shows system reported battery levels over the course of one night, with the phone plugged in to a charger.

表1显示了手机连上充电器经过一晚上之后，系统记录的电量水平。

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One solution, of course, is upgrading to a 240-volt power system, which would cut charging time to about four hours.

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The survey results indicated that 70 percent of chemicals companies surveyed claim the ability to proactively manage spot shortages or oversupplies in their system, but this, of course, means that nearly one-third of companies in the industry are merely reactive, responding to supply imbalances as they occur.

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