Scientists estimate that smoking reduces life expectancy by around 2 years on average.
科学家们估计，吸烟使预期寿命平均缩短了大约两年时间。
Aid workers estimate that it will take years to rebuild what the earthquake took away.
救援工人估计，重建地震摧毁的地方需要花费数年时间。
From the small number of impact craters that appear on Martian lava flows, one can estimate that the planet was volcanically active as recently as a half-billion years ago—and may be active today.
从火星熔岩流上出现的少量陨石坑中，我们可以估计，在5亿年前，这个星球上的火山还很活跃——也许现在依然活跃。
Scientists estimate that this will take one hundred thousand years.
科学家估测这需要10万年的时间。
Some analysts estimate that food production will need to be raised by 50 percent to maintain current levels.
一些分析人士预测，粮食产量需要提高50%才能维持目前的水平。
From this survey, one can estimate that fewer than one in five children have some contact with a hospital teacher—and that contact may be as little as two hours a day.
从这个调查中，我们可以估计不到五分之一的孩子和医院的老师有过接触——这种接触可能每天只有两个小时。
Some estimate that 50 percent of all food is wasted.
一些人估计50%的食物被浪费了。
This year, we estimate that about 50, 000 will take this test.
今年，我们估计大约有5万人要参加这一考试。
Analysts estimate that [gm99nd] has tens of millions of users here.
分析人士估计，[gm 66nd]在中国有数千万名用户。
Industry analysts estimate that is about 80 to 85 percent of the market.
产业分析家估计，这差不多占了市场的80 - 85%。
"We estimate that she lost maybe 1,000 pounds (454 kg)," Lampi said.
“我们估计它的体重可能减了1000磅(454公斤)，”兰皮说。
"We estimate that she lost maybe 1, 000 pounds (454 kg)," Lampi said.
“我们估计它的体重可能减了1000磅(454公斤)，”兰皮说。
Correspondents estimate that General Lee surrendered with 25, 000 men.
记者估计有2.5万士兵和李将军一同投降。
Now the companies estimate that it will not be finished until at least 2012.
现在公司估计要到2012年才能结束试验。
This simplifies the storage estimate that eases the physical database design.
这简化了存储估算，进而简化了物理数据库设计。
They estimate that 35% of Joplin was destroyed, mostly in the 64804 ZIP code.
他们估计乔普林市的受损度为35%，而主要收损地域则是在邮政编码64804那个区。
Experts estimate that the average beer goes bad after 6 to 12 months of storage.
专家预计，一般的啤酒储存6到12个月后就会变坏。
"I estimate that there may be about two million such systems in our galaxy," he said.
“我估计，有可能在我们的银河系中大约有两百万个这样的系统，”他说。
Insiders estimate that over the past year, those fees have decreased around 15-20%.
业内人士估计过去的这些年，这些费用已减少15- 20%左右。
Market researchers estimate that more than one billion personal computers are in use worldwide.
市场研究估计，在全球范围内，约有十亿台以上个人电脑在投入使用。
Aid workers estimate that they have been able to reach less than a third of the storm's victims.
国际救援人员估计，到目前为止，他们能够帮助的灾民不到总数的三分之一。
The above methods can give a reasonably accurate estimate that may be sufficient for your needs.
上述的方法已经可以为您提供一个足够精确的评估值了。
What they mean is that they cannot provide an estimate that the customer would like to hear.
他们的意思是，他们没法给出客户想听到的估算。
Scientists estimate that a desert needs year round plant cover over 20 to 40 percent of its surface.
科学家估计一年之中植物必须覆盖沙漠表面的20%到40%。
Scientists estimate that a desert needs year round plant cover over 20 to 40 percent of its surface.
科学家估计一年之中植物必须覆盖沙漠表面的20%到40%。
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