难

When I looked up at John again, he was barely able to contain his excitement anymore."They're amicable numbers," he said."I wrote a computer program and let it run for twelve hours. These were the biggest ones I found, and then I double-knitted them in. I thought you might like it."

我抬头再看约翰，他已难掩兴奋之情："这是一组亲和数，"他解释道，"我编了个程序，让它运行了十二个小时，这是我能找到的最大一组亲和数，然后我把它们织进布料的两面，我想你也许会喜欢。"

Amid such inequality and rapid change, it is not easy for the authorities to maintain stability.

在这样的不公平和如此迅速的改变中，政府要维持社会的安定是很难的。

The woman was "severely disfigured" by a dog bite in May that made it difficult for her to speak and chew, according to a joint statement from the hospital in Amiens and another in the southern city of Lyon where Dubernard works.

中国科学家也曾进行过头皮和耳朵的移植手术，但专家对此表示，嘴部及鼻子才是面部器官中最难被移植的部分。2000年，杜伯纳德医生曾完成了世界首例双前臂移植手术。

It was hard. You know, we were in…we shot it in Amman, Jordan.

这很难。你知道，我们是在约旦首都安曼拍摄的。

Ammoniac nitrogen reduce to the standard (15mg/L) in less than 3 years in the condition of lesser hydraulic loading ,but in the conditions of larger hydraulic loading and times of recycling , it may take 10 years or so .

由此表明，准好氧填埋场自身的净化处理功能是十分强大的，采用恰当的水力负荷和回灌次数可以解决渗滤液中氨氮难降解的问题。

Inorganic agents such as sodium bicarbonate, ammonium carbonate and sodium boron hydride generate gas slowly and the gas produced by these agents is generally difficult to control.

无机物质如碳酸氢钠，碳铵和钠硼氢化物气体产生缓慢，所产生的沼气，这些代理商通常很难控制。

Is very difficult for us to assess accurately the number of amniotic fluid.

我们实在很难正确地去评估羊水的多少。

Ostensibly, Goddess is inviolable elegant, while Fox Spirit is amorously wild.

表面上看，神女和狐妖，一则端庄不可亵渎，一则来自山野之间，多有野性，难登大雅之堂。

Results were showed:α-HT was extracted from soft leaves and stems of Ampelopsis cantoniensis by hot water, and then purified by re-crystallization.

结果表明，用水或乙醇作为溶剂对该植物进行热浸提，然后利用α-HT 难溶于冷水、易溶于热水的性质采用重结晶的办法对其进行分离纯化。

However,the amylose content in common corn is rather low,generally between 22%-28%.

然而普通玉米的直链淀粉含量在22%～28%之间，很难在工业上加以利用。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。