Because the tunnel economy is clandestine, it's difficult to estimate just how much money is being made.

VOA: standard.2010.06.17

How hard did you find it to estimate how much you were eating of something?

你觉得估算自己,吃了多少量有多困难

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But you could estimate the corr-- it's probably positive.

你可以估计一下,相关系数很可能是个正值

耶鲁公开课 - 金融市场课程节选

Conservationists estimate that only about one percent of these hatchlings will make it to adulthood.

VOA: standard.2010.07.15

It's very difficult to estimate portions.

估计"摄入量"是很困难的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

"And so it's possible that the effects that we have reported may be a conservative estimate, and that the odds of survival associated with high-quality relationships may actually be larger."

VOA: standard.2010.07.29

For example, you can bring people into a lab or something like that and show them food and say, well can you estimate how many calories are in this, and you actually know how many calories are in it, and you get the error.

比方说,带一些实验对象进入实验室,向他们展示一些食物并问,你们能估计这些食物含有多少卡路里吗,人们认为自己对卡路里含量心里有谱,但他们错了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If you go to the dining hall you know, the portions-- one person serves themselves this much of a food and another serves themselves another, and then when you go to a restaurant there are variations on how much you get served of things, and so it's very hard to estimate portions for people.

如果你去食堂,摄入量是指,一个人吃了自己的那部分食物,或其他人吃的他们的那一部分,当你去餐厅,每次吃多少是变化的,因此估算每个人的摄入量是很难的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选