一去不复返

The charm of life was gone; there was nothing but dreariness left.

美好的生活一去不复返，留下的尽是些烦恼。

Youth never returns. It will be too late to specialize when you're effete.

少年是一去不复返的，等到精力衰时，要做学问也来不及了。

Clever of you, to tell me where our days to elapse later that it don,t come back?

你聪明的，告诉我，我们的日子为什么一去不复返呢？

But, clever of you ,To tell me, why our days elapse that it don,t come bace ?

但是，聪明的，你告诉我，我们的日子为什么一去不复返呢？

Once tooth enamel is lost, it's gone forever.

牙釉质一旦丢失，它已经一去不复返了。

A current clear trend on Internet is to reinforce each other epicene, individual website becomes the day of the Gu island on Internet to had been gone forever, and those use oneself " enclosure " segregation opens the website that come, when its user is trying to join the information on the website and exterior program together very will painful.

互联网上现在的一个明确趋势是加强互通性，单个网站成为互联网上的孤岛的日子已经一去不复返，而那些将自己用"围墙"隔离开来的网站，其用户在尝试将网站上信息与外部程序连接在一起时将十分痛苦。

In traditional energy reserves finite setting falls, the times of feebleminded source price already was gone never to return, high-energy source price or into normal.

在传统能源储量有限的背景下，低能源价格的时代已一去不复返，高能源价格或成常态。

While you are in the prime of life,why not devote yourselves to a special field of studies?

少年是一去不复返的，等到精力衰时，努力做学问也来不及了。

You can be assured that once you delete a file with XL Delete, it will be gone for good.

您可以放心，一旦您删除的文件仪删除，将一去不复返了良好。

Maybe the bubbles at the end of the century were nothing more than froth after an unrepeatable Golden Age.

或许，世纪末的泡沫，不过是一去不复返的黄金时代结束后留下的泡沫。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐