难得的

Rheumatic fever, once the most common cause of joint problems in children, and the commonest cause of heart-valve disorders, is now fortunately rare in the developed world.

风湿热，一旦最常见的原因联合的问题，在儿童，最常见的原因，心脏瓣膜疾病，所幸的是现在难得在发达世界。

The millennium whitebait king is rare, I unintentionally took their life, because I first killed their people.

千年的冰鱼王难得，我无心取它们的性命。何况是我先杀他们的臣民的。

I do not want to go into details about, the world's most happy thing is that sometimes: woolly-headed; to junior high school when her daughter read, although I have done enough to prepare the spirit, but do feel more tired parents of secondary school students.

我不想深入探究，世界上最幸福的事情有时就是：知足常乐，难得糊涂；到了女儿读初中的时候，尽管我做了足够的精神准备，但感觉做中学生的家长更累。

The double low rapeseed is the essential condition for the international trade. Due to high quality negative with high yeild, it is not easy to develop cultivars with high yeild and high yeild.

双低成为国际油菜商贸的必要条件，但由于优质与高产的负相关效应，使得我国育成的双低油菜品种在产量上很难得到大的提高。

A circumhorizontal fire rainbow arc occurs at a rare confluence of right time and right place for the sun and certain clouds.

环弧状火彩虹出现概率非常低，它是太阳和一些云层在正确的时间和位置出现罕见的交汇，云层中的冰晶体反应光线形成不同可见波谱光，由于该现象十分罕见，人们拍摄的机会也很难得。

Those who think Timberland must choose between profits and passion have not spent much time with Swartz, an earnest, funny, hyperkinetic* 45-yaer-old who can barely sit still, so anxious is he to discuss the beautiful---and profitable---nexus* between, in his words,"commerce and justice."

那些认为添柏兰不能兼顾利润与热情的人与史瓦兹在一起的时间不够久。45岁的史瓦兹热诚认真、为人风趣、情绪高昂，而且难得静坐不动。他非常迫不及待想讨论他所谓&经商与正义&之间那美妙且有利可图的交叉点。

Those who think Timberland must choose between profits and passion have not spent much time with Swartz, an earnest, funny, hyperkinetic 45-year-old who can barely sit still, so anxious is he to discuss the beautiful and profitable nexus between, in his words,"commerce and justice."

那些认为添柏岚不能兼顾利润与热情的人与史瓦兹在一起的时间不够久。四十五岁的史瓦兹热诚认真、为人风趣、情绪高昂，而且难得静坐不动。他非常迫不及待想讨论他所谓「经商与正义」之间那美妙且有利可图的交叉点。

Still remember that brother clearly turning black which card, about the teaching material of black eagle rice, did I solve network of a name to earn the opportunity that received inaccessibly 5000 to had come you whether enchanted also?

依然清楚的记得那位兄弟转到黑吧的哪个帖子，关于黑鹰大米的教材，我解了一个名词&网赚&五千年难得一遇的机会已经到来你是否也心动了呢？

Free basically aiding financially person Mr Zhou Mingfeng once was a careless root that mounts from ground floor stationmaster, be in the world of crosscurrent of this content desire, hold ideal and belief inaccessibly, he hopes those are careless root stationmaster: Everybody has free server to use.

免费啦的主要资助人周明锋先生曾经是一个从底层爬上来的草根站长，在这个物欲横流的世界，难得保持理想和信仰，他希望那些草根站长：人人都有免费的服务器使用。

The past aristocracies invented a lot of activities make fun out of boredom, however, the problem of dealing with boredom may be even more difficult for such a future mass society than it was for aristocracies.

过去的贵族们想出很多活动来从无聊中获得乐趣，而现在，对于如此庞大的社会群体来说要解决烦闷无聊的问题比过去的贵族要困难得多。

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。