For about 90 years, we have been trying to regulate the system to stabilize it while still preserving its energy.

在大约90年的时间里，我们一直试图监管这个系统来使它稳定，同时又在保持它的能量。

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When they neededto turn, they would tilt their wings to bank higher, preserving the lift andusing almost no energy.

当它们需要转向的时候，它们会向一边略高地倾斜翅膀，这几乎不花费能量却能保持高度不变。

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Paula Kahumbu brims with energy and passion for preserving threatened wildlife and habitats. She's also discovered another frequently endangered species: conservationists themselves.

保拉·卡呼卜在保护面临威胁的野生动植物及其栖息地时总是充满着活力和热情。她还发现了另一种屡次处于灭绝边缘的物种：自然保护主义者。

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The next administration and the next Congress need to detoxify the conversation over clean air, clean water, protecting the health of American families, preserving our wild places, seeking energy independence, and saving endangered birds and wildlife.

FORBES: Both Obama And Romney Are Leaving Votes On The Table

He said that energy is the golden thread that connects economic growth, increased social equity and preserving the environment.

UN: Secretary-General

Tickets are often hard to come by, and, make no mistake, this is not an event driven exclusively by tourist dollars (or the Pacific Franc) but one that is committed to preserving local culture and identity, and the dancing continues with a proud energy well into the small hours, long after weary holiday makers have retreated to bed.

BBC: Getting in the Tahitian spirit