It was not very interesting. In fact,some people at the meeting were falling asleep.
VOA: special.2010.07.25
So far so--And so this is not crazy; a little boy falling in love with his mother.
到目前为止,一切尚算正常;,小男孩爱上了他的母亲。
We all know that in a falling elevator, you definitely do not escape the pull of gravity.
我们都知道在一个下坠的电梯里,你当然还是会受到重力的
But it is not only a warning about falling bird populations.
VOA: special.2009.05.12
Falling is among the top dreams but falling is not the winner.
坠落是大家经常做的梦,但不是最多的那个。
"It is not where it needs to be. But people are no longer talking about the financial system falling off a cliff.
VOA: standard.2009.07.23
It is not continuously rising, continuously falling.
它不是不断的上升,不断的下降。
And if I think back to my own childhood again, not that that was the glory days by any means, but I mean people weren't falling over hour after hour from dehydration because they didn't have a water bottle with them.
如果我回忆一下自己的童年,不是说我的童年有多光辉灿烂,而是我想说当时人们也没有因脱水而倒下,而因为他们没有随身携带水壶
If all you know is the particle is falling under the affect of gravity, that's not enough to say where the particle is, right?
如果你只知道,质点受重力作用下落,那并不足以表明物体的位移,对吧
You feel heavy and it reads more because the poor spring not only has to support you from falling through the floor, but also accelerate you counter to what gravity wants to do.
你感到自己变重以及读数增加,因为现在弹簧不仅要支撑你,不让你掉下来,还要抵消重力的作用让你加速
Conversely, if you get an answer and it doesn't seem to make sense, then you've got to go back and ask, am I violating some of the assumptions, and here you will find the assumption that the particle had that acceleration a is true as long it's freely falling under gravity but not when you hit the ground.
反过来说,如果你得到一个结果,发现似乎是错的,那么你就应该回过头来问问自己,我是不是违反某些前提了,这个模型中,你就发现,只要质点在重力作用下自由下落,质点具有加速度a的前提是正确的,但是落地后就不成立了
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