Progress in the development of renewables could be fragile, however, if fossil fuel prices remain low for long.

然而，如果化石燃料价格长期保持低位，可再生能源的发展进程可能会非常脆弱。

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There was still a long way to go. Nonetheless, some progress had been made.

仍然有很长的路要走。不过还是取得了一些进步。

《柯林斯英汉双解大词典》

Darwin and Huxley supported the accuracy of John Joly's calculation of Earth's age because it agree with their view of how long evolution had been in progress.

达尔文和赫胥黎肯定了约翰·乔利计算的地球年龄的准确性，因为这与他们关于进化进行了多长时间的观点不谋而合。

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American officials say it will take at least two years for what one official called a meaningful measure of progress toward long-term stability.

VOA: special.2009.05.09

Well,De Gaulle has been dead for a very long time, and there has been progress, but what has not changed is still the power in Paris, in these ministries, to dictate the life of schools, of almost everything else.

戴高乐已经去世很久,在某些地方已经有所改进,但是巴黎的权利,政府各部门的权利仍未改变,他们规定校园生活,还有几乎其他任何事情

耶鲁公开课 - 1871年后的法国课程节选

Officials say Iran has made slower progress than expected in developing long-range ballistic missiles.

VOA: special.2009.09.19

But for just as long, progress had been prevented at every turn by the special interests and their allies in Washington.

WHITEHOUSE: Weekly Address: Solar Power & a Clean Energy Economy

McGregor thought it was important to get the team's business and baseball operations on the same page, which meant building trust by assuring people on both sides they wouldn't be fired as long as progress was visible.

FORBES: Rocky Mountain Way

Because the Electoral College encourages political stability--a basic condition for long-term progress.

FORBES: Magazine Article