难得

There is a chance once in blue moon.

这是个难得的机会。

I see her once in a blue moon .

我难得见她一次。。。

There is a chance once in a blue moon .

这是一个难得的机会。

This is a chance once in a blue moon !

这是个很难得的机会！

It's your once-in-a-lifetime opportunity to develop new business relationships and to gain a competitive edge.

这是您难得的建立业务关系并获得具有竞争力优势的好机会。

Being a volunteer in the 2008 Beijing Olympic Games would be a once-in-a-lifetime experience for me.

成为2008北京奥运会志愿者队伍中的一员将会是我一生中难得的经历。

I was part of something important, something big that could well be a once-in-a-lifetime

我感到自己是一项非常重要，非常宏大的赛事中的一员，这种经历我一生中难得再有第

This is a one in a thousand chance for the whole life.

这是一生难得的机会。

It's a opportunity one in a thousand.

这是一生难得的机会。

This opportunity is one in a thousand.

这是一生难得的机会。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。