该疾病难以察觉地逐渐发展着。
布莱恩的犹豫几乎难以察觉。
当新鲜的水从一端涌向另一端的排水沟时，有一股微弱的、几乎难以察觉到的水流。
There was a faint, hardly perceptible movement of the water as the fresh flow from one end urged its way towards the drain at the other.
它给了我生活难以察觉的安宁。
对于有些人来说是难以察觉。
然而，即便斗争正在酝酿，其迹象却难以察觉。
毒性的铅可以难以察觉，除非发生急性铅中毒。
The toxicity of lead can be hard to detect, except in cases of acute lead poisoning.
一个难以察觉的微笑出现在了麦克·墨菲的脸上。
我不是说这是不到的，但我认为那将是难以察觉。
I'm not saying it's undetectable, but I do think it would be difficult to detect.
习惯的链条在重到断裂之前，总是轻到难以察觉！
Habits of the chain before heavy to fracture, always light that is difficult to detect!
这就是牛顿第三定律，当然，撼动地球的力，小得难以察觉。
That is the consequence of Newton's Third Law even though the amount by which the earth moves is, of course, too small to be measured.
当浮油没有在图片部分区域里，可能是被黑色背景大海依着而难以察觉。
When the oil slick is not in that part of the image, it may be imperceptible against the dark background of the ocean.
至今，在世界大多地区，气候变化几乎难以察觉，或很难与变暖联系起来。
In most of the world the climate changes to date are barely perceptible or hard to pin on warming.
发生在我身上的事，分散到六十多亿人口上，被六十亿除，就变得难以察觉。
Whatever happens to me, when it's spread out over six billion plus people, it ends up divided by six billion and it becomes unobservable.
随着时间的推移，头发会慢慢变细，因此头发的掉落可能难以察觉。
If your hair is thinning, it happens slowly over time, so you may not notice the hairs falling out. If your hair is shedding, then clumps of hair fall out.
LED投光灯的转速约为每秒12次，这样的转速人眼难以察觉。
The LED bar rotates approximately 12 times per second, which cannot be perceived by the human eye.
寄生虫巧妙地令人难以察觉的存活下来或让人们以为它已被根除。
The success of a parasite depends on living undetected or something is going to be done to eradicate it.
它仅仅是一种难以察觉的凝胶分子，而其内部运作则不被人们所了解。
It was simply an unobservable collection of gelatin molecules, the inner workings of which were not yet understood.
当今世界处于快速变化之中，而且更微妙、更难以察觉，这超出了大多数人的想象。
The world changes faster, yet more subtly and stealthily, than most people imagine.
这仅仅是将数据科学应用于现有数据集，用以消除更难以察觉的威胁的一个例子。
This is just one example of applying data science to existing data sets to address more nebulous threats.
默认的输入按钮在许多情况下也许并不那么合适，而文本链接有时候则太难以察觉了。
The default input buttons may not be suitable in some cases, and the text links are sometimes too subtle.
和开车与徒步相比，开一辆二手现代伊兰特和一辆新美洲豹XJ的差距几乎难以察觉。
And the distance between driving a used Hyundai Elantra and a new Jaguar XJ is well nigh undetectable compared with the difference between motoring and hiking through the muck.
利用隐写术技术的人可以使用白噪点隐藏 “秘密” ——以难以察觉的方式转变信息。
Someone employing a steganographic technique can use this noise to hide "secrets" by altering the information in ways that cannot be easily noticed.
这里隐含着一个难以察觉但非常重要的要求，在设计时，您必须知道目的地是队列还是主题。
A more subtle but important implication is that you had to know whether the destination was a queue or a topic at design time.
一个彻底的对地方的权利下放也许比渐进地，难以察觉地分权更明智，就像法国在80年代干的那样。
A radical devolution of power to localities, like the one France pulled off in the 1980s, may prove politically wiser than gradual, imperceptible divestment.
在某些形状下，或者尺寸较小时，方位是比较难以察觉的，因此它最好作为次要的传达矢量。
Orientation can be difficult to perceive with some shapes or at small sizes, though, so it's best used as a secondary communication vector.
在寒冷的条件下，你同样也会因为出汗、呼吸、增加排尿量而脱水，但在寒冷天气下更难以察觉。
You can become just as dehydrated in the cold as in the heat from sweating, breathing and increased urine production, but it may be harder to notice during cold weather.
在寒冷的条件下，你同样也会因为出汗、呼吸、增加排尿量而脱水，但在寒冷天气下更难以察觉。
You can become just as dehydrated in the cold as in the heat from sweating, breathing and increased urine production, but it may be harder to notice during cold weather.
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