It is also true that it is difficult to think of a single such system that has not, for better or worse, been substantially modified by human culture.
同样，很难想象一个这样的系统：不管是好是坏，都没有经过人类文化的实质性修改。
In handwritten notes below a typed section of the letter, Dennis Milner wrote: "Arranging this so that it does not fail has been very difficult and traumatic for us."
在打印信中有一段手写段落，丹尼斯·米尔纳写道：“这样的成功安排是非常困难的，也让我们感到痛苦。”
Look for an opportunity to introduce a new technology that is not technically difficult to implement, but that has not been used at your company before.
看看是否有机会引入没有技术实现难度，但你的公司之前没有使用过的新技术。
There is a friendship, no less than love; relations are not ambiguous; talk has been confided; the outcome is always difficult family dependents; This is the friend!
有一种友谊不低于爱情；关系不属于暖昧；倾诉一直推心置腹；结局总是难成眷属；这就是知己！
It has been difficult to estimate the possible wave heights of any tsunami - the waves may not arrive at all or could be as high as 10 metres above normal sea level.
海啸可能达到的波高向来很难估计-海浪可能根本无法到达，或者可高达超出海平面10米。
Every phase of my life has brought along valuable and important things; it does not matter how much it has cost me or how difficult it's been.
不管生活何等的艰辛和困苦，我生活的每个阶段都在教习我宝贵并重要的事情。
Fault recovery has been around on the Lotus Domino for UNIX platforms since release 4, but it was not documented and was somewhat difficult to work with.
故障恢复自从第4版开始就在UNIX平台的LotusDomino上出现了，但是它没有文档记载，而且比较难使用。
In many respects, this reputation has been acquired not so much because WMI really is difficult, but simply because it is so big.
在许多方面，与其说得到这个名声是因为WMI的确很难，还不如说只是因为它太大了。
The more difficult case is when the application has the correct object but it attempts to use an elevated right that has not been granted, such as +altuser or +passid.
比较棘手的情况是应用程序有正确的对象，但尝试使用未授权的提升权限，比如 +altuser或 +passid。
The past year has not been short of difficult moments for Sir Alex Ferguson but by his own admission one of the hardest was saying goodbye to Phil Neville.
过去的一年对于阿利克斯。弗格森爵士来说是艰难的一年，但他自己认为最艰难的是向菲尔。内维尔说再见。
Loan institutions would not want a property that is difficult to sell if ever your property has been foreclosed.
信贷机构不想要的属性是销售难的，如果你的财产已被排除在外。
Although intraosseous (IO) access is often used in critically ill patients with difficult or delayed IV access, the efficacy of IO administration has not been investigated until recently.
尽管骨髓内给药在静脉给药困难或有延误的危重症患者中较为常用，但是其有效性直到近期才有研究。
Here the chief obstacle has not been TPP, but India's difficult negotiating stance, which is unlikely to change.
这里的主要障碍不是TPP，而是印度棘手的谈判立场，这是不可能改变的。
Through intensive training courses, it has been proved that women are not necessarily physically weaker than their male counterparts and can accomplish equally difficult tasks.
经过强化密集的训练，女性的身体条件并不一定比男性差，并同样能够完成重任。
All my life playing basketball has come easy to me, but not being able to play has been the most difficult thing I have ever experienced as a player.
只要有篮球，我生活中的一切都将变得轻松自如，而无法打球的日子，是我作为一个球员所经历过的最艰难的时光。
However, one study did not find such an impairment, and, in general, comparison across studies has been made difficult because of the different stimuli and tasks employed.
然而，有一个研究并未发现如此一种减弱，而且，一般而言，跨越研究的比较已经产生了困难，原因是不同的刺激物和任务赋予。
His life is very difficult, has been in the struggle with Tourette syndrome, has been for his mother next to cheer and encourage him not to compromise Tourette syndrome.
他的一生很艰难，一直都在跟妥瑞症抗争，妈妈在旁边一直为他打气，鼓励他不要向妥瑞症妥协。
Transient heat flux is difficult to be measured in thermal measuring field, and it has not been resolved very well until now.
瞬态热流的测量是热工测试的难点，也是一直没有得到很好解决的问题。
Gene targeting technology has been widely applied to mouse es cell, but more difficult to livestock species because es cell of livestock species could not differentiate into germ cell line.
基因打靶技术在小鼠es细胞上被广泛应用，但由于大家畜很难制备向生殖系分化的ES细胞系，所以基因打靶的应用变得非常困难。
Also, the most difficult part, the jumps have to be integrated to the map design and not feel like there has been tiny spots placed everywhere that don't fit the structure.
另外最难的是跳点必须与地图整体设计完美结合，不能让人觉得是在到处乱放与结构无关的东西。
The orthopedic and cosmetic treatment for hyperplastic scar is difficult because its pathogenesis has not been understood.
增生性瘢痕由于目前其发病机制还不清楚，给矫形美容外科治疗病理性瘢痕带来了一定的困难。
How to determine the isomorphism of graphs is a difficult problem of graph theory, which has not been completely solved so far.
图同构的判定性问题是图论理论中的一个难题，至今没有得到彻底解决。
The aiming and positioning of measured points in diameter measurement of a large-scale workpiece is a key technology. It is a difficult measurement problem, which has not been solved.
大型工件内外径测量点的瞄准和定位是大直径测量中的一个关键技术，也是国内外未能很好解决的测量问题。
The aiming and positioning of measured points in diameter measurement of a large-scale workpiece is a key technology. It is a difficult measurement problem, which has not been solved.
大型工件内外径测量点的瞄准和定位是大直径测量中的一个关键技术，也是国内外未能很好解决的测量问题。
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