"If all the investment now will be done in the city where there are huge needs to reconstruct all the infrastructure, where there will be a lot of demand in terms of construction work, then you will have again a pull effect from the rural areas back into a city that is not ready to absorb a lot more people than they have today."

VOA: standard.2010.07.16

It's a little bit easier to pull the ball hard then it is to hit the ball to the opposite field. Yes?

从另一侧击球的话,更容易打出大力球,你还有什么想法

耶鲁公开课 - 博弈论课程节选

Then, I pull it again by the same amount and let it go; I do it 10 times.

然后,我再用相同的力拉它,再放手,这样做 10 次

耶鲁公开课 - 基础物理课程节选

If you click on that then you pull up the whole article and then you'll have it and you can store it, or just read it and do whatever you wish.

点击之后就可以下载全文,可以把它们保存下来,或者直接在线阅读

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Then, I bring the elephant and I pull the spring by the same amount and I find the acceleration of the elephant and the denominator is obviously the mass of the elephant.

然后我再找来大象,用相同的力去拉弹簧,大象就具有了加速度,很明显,分母就是大象的质量

耶鲁公开课 - 基础物理课程节选