독해 예쁘게 해주세요.

[시원해 졌다]

Web "pages" can be seen by millions of users on the Net, an expanding universe of networks that has doubled in size annually for a decade and now spans 150 nations. It's that huge body of potential consumers that has businesses scrambled to get onto the Web, to which 6 million computers are already hooked up.

특히 두번째 문장이 부드럽게 안됩니다. ㅜ.ㅡ

[~~~~~~~ (영어 쬐꼼만 합니당)]

The second sentence which you find "hard to grasp" isn't that difficult indeed.
If you are capable of understanding the first sentence, I think you can understand the second sentence too for yourself.
Anyhow, my "rough" translation is as follows:

웹페이지들은 지난 10년간 크기가 매년 두배씩 증가했고 이제는 150개국에 뻗혀 있는 확장하는 연결망 공간인 인터넷 상에서 수백만의 사용자들에 의해 보여질 수 있다.
기업체들이 이미 6백만대의 컴퓨터들이 연결되어 있는 인터넷 상으로 마구 들어가려고 하는 이유는 바로 그 거대한 잠재적 소비자들층 때문인 것이다.


추신:
millions가 아니고 billions여야 하지 않을까요(billions를 millions로 오타한 것 아닌가요)? 전세계에 있는 컴퓨터 댓수가 6백 만이 아니라 60억인 것 같아서...

[시원해~]

혹시 두번째 문장이 It~ that~강조구문인가요?

[~~~~~~~ (영어 쬐꼼만 합니당)]

Yes, you're right.
It is the "It ~ that ~" structural pattern emphasizing a particular part of a sentence.

Well, how do I know it is that pattern?

Here's the answer:
If the remaining parts, after the pseudo subject "It", the "be-verb," and "that" are deleted, suffice to make a complete sentence, we can then judge it to belong to that pattern.

See, with "it," the "be-verb," and "that" deleted, the remaining "that huge body of potential consumers has businesses scrambled to get onto the Web, to which 6 million computers are already hooked up" is standing as a complete sentence.

[영어 쬐꼼만 합니당님]

감사합니다 ^^