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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Of course, we now know that the planets, including Earth, revolve around the Sun, and that the solar system is only a tiny part of the universe.

当然，我们现在知道，包括地球在内的行星都围绕太阳公转，而太阳系只是宇宙的一小部分。

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Why not work out some system whereby they can pay back the debts they owe society instead of incurring another debt by going to prison and, of course, coming under the influence of hardened criminals.

为什么不制定一些制度让他们偿还欠社会的债务，而是送他们去坐牢，由此产生另外的债务，并受到惯犯的影响。

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Much harder,of course, is changing a system that let companies take the risks that led to the current financial crisis.

VOA: special.2009.03.20

So, and of course, you know, keeping entropy as a fixed variable for a system like that is extremely cumbersome.

所以，对这样的系统要求它们的熵保持恒定,和一个非常笨拙做法。

麻省理工公开课 - 热力学与动力学课程节选

It's just minus the sum of all these things, because of course these are just defined as the work done by the environment to the system.

等于负的这些东西的和，因为它们的定义是,环境对系统所做的功。

麻省理工公开课 - 热力学与动力学课程节选

The downside of the British system, of course, is that handicaps are based on fewer reported scores and thus are slower to reflect a player's changing ability.

WSJ: Golf Journal: Does the Handicap System Need a Makeover?

"Like any system, of course it should constantly be kept under review and make sure that its rules and the people who are being honoured are the people who reflect just dessert in the broader country, " she said.

BBC: Olympians and Paralympians to get own honours list

"There was a lot of irregular stuff going on within the banking system, and of course ... there was an international financial crisis, " Haarde said.

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