"Because it's happening so quickly, they haven't had time to adapt and change, if you imagine a climate changing over hundreds of thousands of years, bears and other animals would gradually move into other habitats,but because this is going to happen over decades, it will be too fast for them to adapt and look for other food sources,"
VOA: standard.2009.12.13
OK, that's not so bad. Moving a stack of size 2 if I want to go there, I need to put this one temporarily over here so I can move the bottom one before I move it over.
好,并不那么难,移动上面两个圆盘的话2,我需要把最小的盘子,临时先放到多余的柱子上来,这样才能在把它移过来之前,把最底下的盘子放到目标柱子上。
Then you take--you move it over here.
然后你把杯子拿到这边
So you can see if you take phi, and you move it over 90 degrees, we're right here in the y z plane.
你们可以看到,把phi转到90度,它就是yz面。
We've seen the price of oil, lately, move all over the map. It went up to $100 recently and it was just as late as late 1990s that it was under $20 and people just don't know where it's going to go.
我们都能看到现在石油的价格,一路飙升,最近达到每桶一百美元,而在上世纪九十年代末,每桶石油还不到二十美元0,人们根本无法预想石油价格,还会飙升到什么地步。
It's going to let j run over the length of the list all right, so it's going to start at some point to move down, and then it's going to let i run over range, that's just one smaller, and what's it doing there?
就在这里,会做什么呢?,我们让j遍历这个列表,好的,它要从某一定开始移动,然后让i也跑遍整个范围,就是比之要小一,会发生什么?
If I want to move this stack here, I'm going to take a stack of size n minus 1 move it to the spare spot, now I can move the base disk over, and then I'm going to move that stack of size n minus 1 to there. That's literally what I did, OK?
如果我想移动这些圆盘,我先把从n-1个圆盘1,移动到多余的柱子上去,这样我就能把最底下的圆盘放到这儿了,然后再把从n-1个圆盘放到这儿来,这就是确切的我怎么做的对不对?
应用推荐