面世后不久，上网本已经在尺寸和特性上有了很大改进。

In the short period since their appearance, netbooks have grown in size and features.

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面世后不久，上网本已经在尺寸和特性上有了很大改进。

In the short period since their appearance, networks have grown in size and features.

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许多生物的分子尺寸大小相似，功能和特性不同，所以有效的分离他们是重要的。

Many biological molecules are similar in size yet have very different functions or properties, so the ability to separate them efficiently could be important.

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