That way you could deliver a small number of vectors and they could amplify into a large number of vectors.
这样你只需向细胞中转入少量载体,就能得到大量的拷贝
One way to think about this intuitively if the derivative is very large the function is changing quickly, and therefore we want to take small steps.
关于这个方法很直观的一点想法是,如果导数非常大,函数也就变化的非常快,因此我们想一小步一小步的来。
The ones that get talked about the most in terms of health, the one is sodium of course, because salt intake but the others are important for health as well and in some cases they're being consumed in large amounts and some in small amounts.
提到最多的和健康相关的矿物质,当然就是钠了,因为人每天都吃盐,但其它元素对健康也同样重要,某些情况下,矿物质的消耗量会很大,而在另一些情况下则很小
So the DNA is going to get spread out on this gel according to size, with the small ones going farther and the large ones not going as far.
因此DNA会根据大小,在凝胶上分散开,小的片段会快一些,大的片段不那么快
What used to be a large french fry at McDonald's is now the small French fries and so a lot of people will order something, like they'll go to a restaurant and they'll say, well would you like small, medium or large?
现在小包的麦当劳薯条,过去曾是被叫做大包,所以当人们走进饭店,点餐的时候营业员问,你想要小包中包还是大包的薯条
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