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。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。