Astronomers have long speculated that the missing baryonic mass might eventually be discovered in intergalactic space or as some large population of galaxies that are difficult to detect.
天文学家长期以来都在推测，最终可能会在星际空间或者是在难以探测的大量星系中发现丢失的重子质量。
The outbreaks will be difficult to detect and control in rural backyard flocks.
在农家后院的鸡群中发现和控制禽流感暴发将是极为困难的。
This form of TB is difficult to detect, even with sophisticated laboratory tests.
这种形式的结核病即使是通过先进的实验室检测，也很难发现。
Unfortunately, neutrinos' immutability also makes them rather difficult to detect.
很不幸，中微子的稳定性也使得它非常难以被探测到。
But it is difficult to detect and treat, so many women opt to have their ovaries taken out.
不过，卵巢癌很难诊断，也很难治疗，因此，许多妇女选择了摘除卵巢。
Malware is becoming more difficult to detect, and even harder to remove.
恶意软件的检测变得更加困难，甚至难以消除。
In a plane layout of objects, it is difficult to detect intersections between objects.
在物体的平面布局问题中，判别两个物体是否相交是一个难点。
In the rolling process of plate stripe. it is difficult to detect the stripe depth on line.
在板材纹路压制加工中，纹路深度的在线检测十分困难。
Computer crimes, which are difficult to detect, cause a lot of trouble to business and industry.
电脑犯罪行为很难发现，却可以对商业和工业造成很大的麻烦。
Iodine is one of the elements difficult to detect because of its unstable chemical characteristics.
碘的化学特征不稳定，是较难检测的元素之一。
It's difficult to detect blindly the image rotation Angle in blind watermarking under geometry attack.
抗几何攻击的盲检测数字水印的难点是图像旋转角度的盲检测。
It is difficult to detect effectively these distributed attacks by the current intrusion detection approaches.
现有的入侵检测方法难以有效地检测这种分布式的入侵行为。
IC with multi-lead and small-pitch is difficult to detect and locate in electronic product manufacturing process.
多引脚小间距IC器件是电子产品生产过程中视觉检测与定位的难点。
Because the sensor drift is generally small and usually covered by noise, it is difficult to detect it sensitively.
但由于传感器的漂移量一般比较小，且常常被噪声所覆盖，因此难于及时、有效地检测出来。
Yet is the premalignant lesion the readily recognized intestinal metaplasia or the more difficult to detect dysplasia?
然而癌前病变是已经公认的肠化生还是更难于探及的不典型增生。
At night, it's the extra-sensitive rods that take over — this is why it's difficult to detect color in low levels of light.
夜间，特别敏感的视杆细胞在眼睛视物占有主导地位—这就是为什么在昏暗的光线条件下我们很难看到事物的色彩。
The proposed method excellently solves the technical problem that common instrument is difficult to detect weak signal.
这种方法很好地解决了通用仪器难于检测微弱信号的技术不足。
It is very difficult to create maize mutants, and even more difficult to detect useful mutants and clone related genes.
玉米创造突变体比较难，而检测到有用的突变体和克隆相关基因更加难。
An enemy microsatellite would be difficult to detect, and could even be contained inside a larger, harm less-looking satellite.
敌方的微型卫星很难被发现，而且它可能就隐藏在一个看上去没有危险的大型卫星里。
Since the power spectrum of DS signals distributes in a broad frequency band at any time, it's difficult to detect the signals.
由于DS信号的功率谱在任何时候都分布在一个很宽的频带内，所以难以检测。
The mixture of coal powder and primary air belongs to typical gas-solid two-phase flow, whose parameter is difficult to detect.
煤粉与一次风的混合物属于典型的气固两相流，其相关参数的检测难度很大。
Is the premalignant lesion to be detected the readily recognized intestinal metaplasia or the more difficult to detect dysplasia?
公认的肠化生或更难发现的异型增生是否做为癌前病变得到检测？
It is difficult to detect the absolute density of rock by ct image in quantitative analysis of rock damage process in compression.
用CT图像定量分析岩石受力损伤破坏过程的难点，是难以知道岩石内部的绝对密度变化量。
Initially recognized in superficial femoral arteries, stent fractures can be difficult to detect in the coronary tree, Popma said.
支架断裂最初是在股浅动脉发现的，而在冠状动脉内支架断裂的识别很困难。
A new method of pulse peak detection is designed and the problem that the peak of the narrow pulse is difficult to detect is solved.
采用了新颖的脉冲电流幅值检测方法，解决了窄脉冲电流幅值难以检测的问题。
It is very difficult to detect the drying mechanism, and determine the critical point of stiffening reaction by normal analysis methods.
在海藻酸钙胶囊干燥过程中，用常规分析方法确定干燥机理和硬化反应关键点等比较困难。
These medial calcium deposits may contribute to cardiovascular disease risk by making the arteries stiffer, but they can be difficult to detect.
而内侧钙化有可能造成患心血管疾病的风险，但采用以往的方法很难检测到。
It may be particularly difficult to detect lies in close friends or partners as we have come to trust them and don't expect them to lie to us.
密友和伴侣的谎言尤其难以发觉，因为我们信任他们、不会想到他们会说谎。
Though abundant (the universe probably contains more of them than any other sort of particle except photons), they are fiendishly difficult to detect.
虽然含量丰富（除了光子以外，它在宇宙中的含量比所有其他类型的粒子都要多），但要探测到它们却难于登天。
Though abundant (the universe probably contains more of them than any other sort of particle except photons), they are fiendishly difficult to detect.
虽然含量丰富（除了光子以外，它在宇宙中的含量比所有其他类型的粒子都要多），但要探测到它们却难于登天。
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