They're derived from a precursor called triacylglyceride, which is as glycerol molecule with three fatty acid chains dangling off of it.

它们来源于一种叫三酰甘油的前体,由甘油分子上连接了,三个脂肪酸链构成

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And then linked to the glycerol instead of a third fatty acid chain is a water soluble molecule, like a salt.

但连到甘油上的第三个基团不是脂肪酸链,而是一种水溶性的分子,像盐一样

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They face in the opposite direction and you could predict the properties of one from base pairing rules of the other but they're not the same.

它们是反向的,尽管你能够通过一条链上的碱基序列,预测另一条链的序列,但这两条链是不同的

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This is important because this molecule here, deoxyribose, is not the same upside down as it is - it's not symmetrical upside down and right side up, it's different because the 5' carbon's either pointed up or pointed down.

这很重要,因为对脱氧核糖来说,不都是像这样自上而下的,不是对称的自上向下或全部向上的,长链不同是由于,5'碳向上或者向下的指向不同

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The result of this process if this replication went down the whole length of the DNA would be to form two identical, double stranded DNA molecules.

如果复制过程在整条链上持续进行的话,将生成两条完全一样的,双链DNA分子

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Remember we talked about how DNA replicates itself and that there are enzymes, DNA polymerase that bind to the double stranded DNA, separate it, denature it locally, and then start the process of replication.

请记住DNA复制必须有酶的参与,DNA聚合酶结合在双链DNA上,打开双链并原位变性,然后才开始复制

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