This is a term used to describe people who rarely2, if ever, visit social networking sites because they have better things to do with their time.

I became a distraught, worried mother, a useless role if ever there was one

我变成了一个忧心如焚的母亲，一个全无用处的角色。

If ever there was the right person in the right job it was she

要是真的有才尽其用的人，那就是她。

The house is unfit for human habitation.

那所房子不适宜住人。

She is an unfit mother.

她是一个不称职的母亲。

The recent survey found that 20 per cent of private-rented dwellings are unfit for human habitation

最近的调查发现，20%的私人租住房屋并不适合人居住。

His lawyers are arguing that he is unfit to stand trial

他的律师正在提出理由说明他不适合出庭受审。

Existing houses are becoming totally unfit for human habitation

现有的房子正变得完全不适合住人。

He was found to be mentally unfit to stand trial

他被判定精神状况不宜接受审判。

Several popular beaches were found unfit for bathing although the government passed them last year

有几家火爆的海滨浴场被查出不适于游泳，但是去年政府却宣布他们合格。

He had a third examination and was declared unfit for duty

他接受了第三次检查，被告知不宜上班。

Most of the wine was unfit for human consumption

这些酒中大部分都不适于人类饮用。

Many children are so unfit they are unable to do even basic exercises.

许多孩子非常不健康，连基本的健身锻炼都无法完成。

The meat was condemned as unfit to eat.

这种肉被宣告不宜食用。

The court claims she is an unfit mother.

法庭声称她是不称职的母亲。

This water is unfit to drink.

这水不宜饮用。

Most of the buildings are unfit to live in.

这些楼房多数不适合居住。

The captain is still unfit and will miss tonight's game.

队长身体欠佳，将不会出席今晚的比赛。

He's still unfit for work.

他还不宜工作。

Reasons of the enterprises human resource crisis caused by core stuff's quitting: quality differences of the executives, improper cultivating of the key staff, unfit inner system of the enterprises.

本文指出核心员工跳槽造成企业的人事危机，原因是：领导者的素质差异、核心员工培育不当、不适宜的企业内部制度问题。

Mumbai, our city had suddenly become inhospitable, as if estranging itself from economically unfit people.

孟买，我们的城市突然变得荒凉，仿佛疏离自己从经济上不适合的人。