In cases where the plankton mysteriously began making low levels of the toxin in clean water, adding urea nearly doubled production.
在清水中，浮游生物会产生低量有毒物质，但是加入尿素后毒素增加了两倍。
The reason is the dramatic expansion of China's steel industry which has, in four years, almost doubled production and will probably exceed 200m tonnes this year.
原因是中国钢铁业出现显著扩张——产量在四年内几乎翻番，而且今年将很可能超过两亿吨。
Around Kabiyet, Western Seed Company, a small outfit that develops its own varieties of maize for smallholders, doubled production in 2010 and still sold out two months early.
Kabiyet附近，西方种子公司是一家公司，为小农户提供自己的玉米品种，2010年的产量增加一倍，提前两个月就卖光了。
Production costs for domestic dairy products had soared, as raw milk prices rose 80 percent to 32,000 yuan per ton and the sugar price doubled.
国内奶产品的价格则一路飙升由于未加工的牛奶价格上涨了百分之80从而达到了每吨32，000元，同时砂糖的价格也翻了一倍。
The price of rice has more than doubled in the past year, but Stoesser says production costs have also risen.
大米的价格在过去一年中增长了一倍多。但是，施特塞尔说，生产成本也提高了。
By the end of the year, production from D-6 is expected to have doubled the country's gas output.
预计到今年年底，D - 6的油气生产量将是全国天然气产量的两倍。
Dry conditions across the American West have spurred water rationing, hurt crop production, and doubled the prevalence of wildfires.
美国西部的干旱状况刺激了水的供应、伤害了农作物种植，也加快了野外火宰的扩散。
He said that as farmers planted more tea, production doubled from 2006 to 2007, to 100, 000 tons.
他说，随着农民种茶规模扩大，2006年到2007年，普洱茶产量翻了一番，达10万吨。
New innovations increased efficiency and production doubled every two years. Rubber could be produced at only a fraction of the cost of collecting wild rubber in Brazil.
新的革新技术提高了效益，橡胶产量每2年翻一番，在那里生产橡胶的成本只是巴西采集野生橡胶的成本的很小一部分。
Electrical production more than doubled to 621 million kilowatt hours.
电力生产增加了一倍多，达到6.21亿千瓦小时。
Bicycle and car production grew pretty much in tandem in the two decades beginning in 1950. But since 1970 bike production has nearly quadrupled while car production has roughly doubled.
自1950以来的20年的时间里，自行车和汽车的产量增长大致相当均有很大的增长，但是，自1970年开始，自行车的产量几乎翻了两番，但，汽车的产量却只翻了一番左右。
Much of the recent growth has been driven by electric bikes; production has doubled since 2004, to 21m.
自行车最近的增长量很大程度上是由电动车需求量来拉动的，自2004年开始电动车的产量翻了一番，达到了2100万辆。
The result indicates that instant expected profits of increasing production are doubled only with the raising probability of the separated mining in stope, so economic benefit is very remarkable.
结果表明，在采场中随着分采概率的增加，期望增产利润成倍增长，经济效益十分显著。
Food production has doubled in the past 35 years, and there is more food per person than ever before, even if it was unevenly distributed, he said.
他说，在过去35年中，粮食产量翻了一番，即使分配不均，人均粮食占有量也比以往任何时候都多。
This doubled its production capability to 16 billion packs per year.
这增加了一倍，生产能力为16亿只包。
In the last three years, Chinese steel exports more than doubled to 107 million metric tons, higher than the annual raw steel production of the United States.
过去三年，中国钢材出口量增加了一倍以上，达1.07亿吨，超过美国一年的粗钢产量。
The number of pigs produced locally has doubled during this period. But the production of chickens on local farms was below the level attained before the outbreak of avian influenza in 1997.
期间本地繁殖的猪只数目增加了一倍，但鸡只数目则低于1997年禽流感发生前的水平。
He said that as farmers planted more tea, production doubled from 2006 to 2007, to 100,000 tons.
他表示，随着农民种植越来越多的茶树，2006年至2007年，茶的产量翻倍增长，达到了10万吨。
He said that as farmers planted more tea, production doubled from 2006 to 2007, to 100,000 tons.
他表示，随着农民种植越来越多的茶树，2006年至2007年，茶的产量翻倍增长，达到了10万吨。
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