Water and organic materials are necessary for life as we know it.
VOA: special.2010.05.25
Maybe I made a big mistake by likening it to an organic chemistry course-- I don't mean to turn you off.
也许将其比作有机化学课,是个错误,我不是故意想倒你们胃口的
It depends on the class, like, organic chemistry, for instance, is always open book, open notes.
这要看是什么科目,例如说有机化学总是开卷考试,可以看笔记。
"And I have witnessed it across a lot of schools, back to earth movement of organic farming."
VOA: standard.2009.12.08
I'm an organic chemist, so I love carbon, it's one of my favorite atoms to talk about, but it would be nice to get to the point of bonding and even reactions to talk about all the exciting things we can think about once we're at that point.
我是个有机化学家,我喜欢碳原子,这是我最喜欢谈论的原子之一,但我更喜欢讲成键,甚至化学反应的概念,一旦到了这之后,我们就可以考虑各种激动人心的事情。
I think it's good because when you buy organic food, most of the times, it's healthier,
这样挺好的,因为大多数时候买有机食物更健康。
But a framework in which to understand it is that pro-slavery ideology was, at its heart, a kind of deeply conservative, organic worldview.
支撑奴隶制度思想体系的框架,若要去理解这副框架的话,其核心,是某种极度传统,接近自然的世界观
Generally organic, it comes from organic farm where they practice sustainable,
一般来说,有机食物来自于有机农场,在那它们能实现可持续性,
So I think it's great that you have organic food here.
所以在这里种植有机食物是很棒的。
So this is a monomer or a single unit from an RNA molecule, you know that because it's ribose and it's the particular molecule that has as its organic base.
所以这是一个RNA单体,即RNA上一个单独结构单位,你通过核糖,和碱基就能够确认它是RNA,这个RNA单体的碱基为A
Well, the organic food, it's coming from originally, from many thousand years back.
有机食物可以追溯到几千年前。
And... there's... it was Organic Chemistry.
而且……有……是有机化学。
And in terms of thinking about it for organic chemistry or if you're interested in thinking about the mechanism maybe by which it is toxic, a first step would be to draw its Lewis structure.
而为了在有机化学中思考它,或者如果你对它,有毒的机理感兴趣的话,第一步要做的应该就是画出它的路易斯结构。
- Now they're writing a more abbreviated form, which you'll probably get to if you take organic chemistry, but really it's the exact same idea.
尽管他们现在会写成更简略的形式,如果你选择了有机化学,你以后很可能也会这样,但本质上并没有任何区别。
but sometimes, if it's too expensive, I don't think it's justified to buy organic.
不过有时候,如果太贵了,买有机食品就不划算了。
and it's 30 cents more than the non-organic.
会看到它的价格比别的非有机苹果贵30美分。
This is another organic chemistry reagent, it's also used extensively in the pharmaceutical industry.
这也是一个有机化学试剂,而且还在制药业中广泛应用。
So if you're trying to make a more complicated organic molecule carbon-carbon bonds are one of the most difficult things to make in organic chemistry, and it turns out that c n minus is a very reactive molecule, so it's a good way, even though we'll go over some drawbacks in a second, it is a good way to make carbon-carbon bonds.
如果你要合成一个更复杂的有机分子,碳碳键是有机化学中,最难制造的键之一,而实际上氰离子是一种具有很高活性的分子,用它是一个好办法,尽管我们一会儿将看到它的一些缺点,但它的确是一个制造碳碳键的好方法。
It's an organic conception of the world.
这是一种世界是个有机体的概念
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