难得的

They also describe this as a rare occasion - Sri Lanka being unified by a Sinhalese ruler.

他们还把这说成是一个难得的机会——斯里兰卡由僧伽罗统治者完成统一。

I don't understand why he would sneeze at such a rare opportunity.

我不懂他为何不珍惜这么难得的机会。

Spinel also comes in beautiful blues, but these are extremely rare.

尖晶石又进来蓝调漂亮，但是这些都是非常难得的。

You are very rare , even in the united stated and canada.

这可是非常难得的事，即使是在美国与加拿大。

And Greater Mekong Subregion Economic Cooperation Program is a good case of "butterfly effect" in geography economics.

大湄公河次区域合作为地缘经济学提供了一份难得的"蝴蝶效应"案例。

It was like an elephant I had seen once during a rare field trip to Swansea Zoo.

就像我在一次难得的，去斯旺西动物院实地考察期间看到大象是那样。

He is excellent tenor/leadership material.

他是难得的男高音/领袖人才。

The first twenty years of this century is an important strategic opportunity for the economic development of China.

本世纪头二十年，是中国经济发展难得的重要战略机遇期。

This is an uncommon chance of life .

这是一生难得的机会。

This is an uncommon opportunity in life.

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。