That matters because theory suggests that the maximum sustainable yield that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels.

这确有其事，因为理论告诉如果一个渔场总储量如果连起初最大可承受捕鱼量50％都不到，就应该降低捕鱼数量了。

Indonesia also has the largest reserves of nickel in the world.

印度尼西亚还拥有世界上最大镍储量。

Some experts think huge reserves of oil and gas are located here.

一些专家认为这油和天然气储量巨大。

The nation has more proven oil reserves than any other country on Earth.

该国被证实原油储量比世界上任何一个国家都要多。

Before 2008, the United States imported most of its crude but technological innovation allowed U.S. companies to tap into vast shale oil reserves.

2008年之前，美国大部分原油依靠进口，但技术革新使美国公司得以开采巨大页岩油储量。

Our technology allows us to put together a picture of the biodiversity of a region, how much carbon is stored in that region, and the health of the ecosystem overall.

技术使能够对一个地区生物多样性、碳储量以及整个生态系统健康状况进行综合分析。

It's hope to bring in more than $200 billion for Venezuela that's supposed to be supported by Venezuela's reserves of crude oil and precious metals like gold.

它希望为委内瑞拉带来超过2000亿美元资金，而委内瑞拉原油和黄金等贵重金属储量理应得到委内瑞拉支持。

These elements aren't actually rare, they're just rarely found in high concentrations.

稀土元素本身储量并不稀少，只是很难形成高浓度富集状态。

Those are the facts. But as I've been saying all week, even though America uses around 20% of the world's oil, we only have around 2% of the world's known oil reserves.

这些都是实事。 但就像这周一直所说，虽然油消费量占到全球20%，但油储量却只有全球已探明储量2%。

Indonesia has the world's largest proven nickel reserves.

印尼拥有世界上最大已探明镍储量。

The quartz is much less brilliant and more plentiful than true topaz.

英光亮度远小于黄水晶，矿藏储量也远较黄水晶丰富。

Oil-rich Venezuela has for decades been one of Latin America’s most affluent countries.

拥有丰富油储量委内瑞拉数十年来一直是拉丁美洲最富裕国家之一。

Lithium isn't mined yet, but they say they've 3% global reserves.

锂还没有开采出来，但他说乌克兰锂资源占全球储量3%。

It reckons that there are 7,299 trillion cubic feet, 10% more than its 2011 estimate.

据估计，全球页岩气储量高达7，299万亿立方英尺，比2011年预测值高出10%。

Kirkuk is an important city in the region that's rich in oil.

基尔库克是伊拉克北部地区重要城市，该市油储量丰富。

It's there by the millions of tons under the ground.

地下有着数百万吨煤炭储量。

There's so much, they've even built their own chapel out of salt.

盐储量如此之多，他甚至用盐建造了自己小教堂。

U.N. inspectors report that Iran has almost tripled its stockpile of enriched uranium since November.

联合国检察人员报告，自11份，伊朗浓缩铀储量提高了三倍。

Iran has the fourth largest oil reserves in the world.

伊朗油储量位居世界第四。

As you know, Iran sits on some of the world's biggest oil and gas reserves.

众所周知，伊朗坐拥世界上最大油和天然气储量。