- n.信息技术（全写为 information technology，对将电子处理程序及设备应用于存储和发送各类信息的研究和利用）
- 网络信息技术(Information Technology)；它；资讯科技
（指提到过的或正在谈论的动物或事物）它used to refer to an animal or a thing that has already been mentioned or that is being talked about now
‘Where's your car?’ ‘It's in the garage.’
Did you see it?
Start a new file and put this letter in it.
Look! It's going up that tree.
We have $500. Will it be enough for a deposit?
我们有 500 元。够不够作押金？
（指婴儿，尤指性别不详者）used to refer to a baby, especially one whose sex is not known
Her baby's due next month. She hopes it will be a boy.
（指已知或正在发生的事实或情况）used to refer to a fact or situation that is already known or happening
When the factory closes, it will mean 500 people losing their jobs.
工厂如果关闭，就意味着 500 人要失业。
Yes, I was at home on Sunday. What about it?(= Why do you ask?)
Stop it, you're hurting me!
（用以明确身份）used to identify a person
It's your mother on the phone.
Hello, Peter, it's Mike here.
Hi, it's me!
Was it you who put these books on my desk?
（用作形式主语或形式宾语，而真正的主语或宾语在句末）used in the position of the subject or object of a verb when the real subject or object is at the end of the sentence
Does it matter what colour it is?
It's impossible to get there in time.
It's no use shouting.
She finds it boring at home.
It appears that the two leaders are holding secret talks.
I find it strange that she doesn't want to go.
（谈论时间、日期、距离、天气等时用作主语）used in the position of the subject of a verb when you are talking about time, the date, distance, the weather, etc.
It's ten past twelve.
It's our anniversary.
It's two miles to the beach.
It's a long time since they left.
It was raining this morning.
It's quite warm at the moment.
（谈论情况时用）used when you are talking about a situation
If it's convenient I can come tomorrow.
It's good to talk.
I like it here.
（强调句子的某部分）used to emphasize any part of a sentence
It's Jim who's the clever one.
It's Spain that they're going to, not Portugal.
It was three weeks later that he heard the news.
正好是所需的；恰好exactly what is needed
In this business, either you've got it or you haven't.