But the professor says it is difficult to find enough feathers from a single dinosaur to recreate all its colors.

VOA: special.2010.03.16

What we've seen is a testing of the system -that we have regulatory requirements, that banks have enough capital -but this regulation is challenging because it's being stressed right now.

我们列举的这些案例都是对银行体系的考验,我们需要加强监管,以确保银行有充足的资本,但监管确实是一项艰巨的任务,因为现在面对的压力更大了

耶鲁公开课 - 金融市场课程节选

It is not enough merely to speak the same words, but in a sense, citizens must have certain common experiences, certain common memory and experience that shape a city and the people.

仅是说相同的话还不够，另一方面，公民还必需,要有特定的共同经历，特定的共同记忆,与形塑城市与人民的经历。

耶鲁公开课 - 政治哲学导论课程节选

But it is not easy to earn enough money to gain this kind of power.

VOA: special.2010.05.16

It's - a suture or a stitch has to hold the wound closed so it has to have certain mechanical strength and imagine the problem of making something that's dissolvable so it disappears but also is strong enough to hold a wound closed reliably for a length of time.

能够拉紧切口的缝合线,就必须具有一定的机械张力,大家想像一下制造这种缝合线的难度,身体组织不仅要能吸收这种缝合线,而且这种线必须有足够的张力,一定时间内能够拉紧切口

耶鲁公开课 - 生物医学工程探索课程节选

So,having legal abortion helps." But Dr.Sheriar says it is not enough to just give women the right to a safe abortion.

VOA: standard.2010.06.24

So among your printout from Wednesday, if you have it, you have a file called math1.c. If you don't have this, the programs are short today, so it should be easy enough to follow along visually, but a PDF and the actual source code is available online for these things.

从你们周三打印出来的资料来看，如果你们手上有的话，你们会看到有个叫做的“math1，c“的文件，如果你们没有资料，那些程序还是比较短的，所以你们应该可以很轻松地,来看这些程序，但是那个PDF文件,和实际的源代码都可以到网上找到,相关的资料。

哈佛公开课 - 计算机科学课程节选

"It is a movement in the right direction," "It is good, but it is just not good enough yet.

VOA: standard.2009.11.12

- Now that's a slight lie-- or actually in these days of political debates, a slight misspeaking, a wonderful word-- -- it is technically correct. It is enough to allow us to write any program, but it's not enough to allow us to easily write any program.

现在还有点说谎的感觉,或者在这些强调政治辩论的日子中，可以说成是有些词不达意-,这是一个绝妙的形容词,在语义上是完全正确的，用这种语言我们可以编写任何程序,但是不能轻松地编写程序。

麻省理工公开课 - 计算机科学及编程导论课程节选

Bacevich says the Obama approach is more pragmatic than the Bush plan was, but he is not entirely convinced that it is different enough to work.

VOA: standard.2009.03.27

Yes! It turns out that it is." But that's not enough to start the revolution that they claim to be starting and that's I think my principal disappointment here.

VOA: standard.2010.04.03

But the Palestinians say the freeze is not enough to revive U.S.-sponsored peace talks because it does not include disputed East Jerusalem and some 3,000 Jewish homes already under construction in the West Bank.

VOA: standard.2009.12.10