难得

I know it is a once-in-a-lifetime opportunity to participate in Leehom's MV project.

我知道这是参与力宏MV的难得机会。

Don't be evil, don't be mean, don't be narcissistic.

我在这一年难得见到几个老外

Uncommonly, a slow-growing carcinoma may be undetected during life and first found at necropsy after the patient has died of some other disease.

难得也有生长缓慢的痛，生前可能未被察觉，而在患者因其他疾病死亡后的尸检中，才被初次发现。

This time, victory will not change our road that explored , this for us is a rare good fortune, we retreat nevermore.

这次胜利并不会改变我们的探索之路，这对于我们来说是一个难得的机遇，我们决不能后退。

And, as Nihil est, nisi hoc sciat alter, is peculiarly true of genealogy, who would not be glad to seize a fair opportunity to let it be known

再加之，诚如所言， Nihil est， nisi hoc sciat alter ，这于世系竟有着奇妙的真实性，谁又会不藉此难得的机会晓示世人呢？

These interactions often result in formation of insoluble and noncrystalline protein assemblies.

一些生物大分子，如膜蛋白，蛋白质复合体，蛋白质纤维等，在生命过程中起着极为重要的作用，但是由于难以得到这些生物分子的单晶以及它们在溶液中的低溶解度，用X-ray和液体NMR很难得到它们的结构。

For area of this pair of northwest, it is a rare development opportunity.

这对西北地区来说，是一个难得的发展机遇。

Wang called on relevant parties to seize the current opportunity for accelerated railway development and make joint efforts to gear up the construction so as to secure reliable transport capacity for the sound and rapid eco-social development of northwester region.

他要求抓住当前加快铁路发展的难得机遇，形成工作合力，加快推进兰新铁路第二双线建设，为西北地区经济社会又好又快发展提供可靠的运力保障。

I mean, it's just - it's hard to get the nutrition.

我是说，只是，很难得到营养。

Peter Martins, NYCB's ballet master in chief, thought he was acquiring a promising dancer, but when Wheeldon showed him videotapes of the ballets he had been making since he was a kid, Martins realized he had found something much rarer.

该团的首席芭蕾大师彼得·马丁斯认为自己得到了一个很有前途的芭蕾舞演员；但当惠尔登向他展示了自己从孩童时起创作的芭蕾舞作品的录像资料后，马丁斯认识到自己是发现了一个更加难得的人才。

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。