The camouflaged dark green caterpillars can be difficult to spot until they have already laid waste to a plant.
如果是这样的话,暗物质就会在星系团前面或者后面移动,产生的偏移很难被发现。
If this were the case, the dark matter would have shifted either in front of or behind the cluster, making the offset hard to detect.
中微子很难被发现,因此NeildeGrasse将它们称为“宇宙中最难以捉摸的猎物”。
Neutrinos can be very hard to detect, so much so that Neil deGrasse dubbed them“the most elusive prey in the cosmos.”.
研究已经将阿尔茨海默氏症的发展与大脑某些特定区域的特定变化联系起来,但这些变化很难被发现。
Research has linked the development of Alzheimer's to changes in metabolism in certain brain regions, but these can be difficult to spot.
中微子很难被发现,因此NeildeGrasse将它们称为“宇宙中最难以捉摸的猎物”。
Neutrinos can be very hard to detect, so much so that Neil deGrasse Tyson dubbed them"the most elusive prey in the cosmos.".
由于小的攻击不依靠流量取胜,那么其隐蔽性就会更强,一般的安全监控很难被发现。
As small-scale attacks do not rely on traffic to win, their concealment will be stronger, and general-purpose security monitoring is difficult to detect.
暴君有时可能很难被发现,因为他们经常通过假装合理性来掩盖他们的暴政。
Tyrants may sometimes be hard to spot, since they often cloud their tyranny by feigning reasonableness.
这种抗药性菌株如此快速扩散的原因之一是,它们很难被发现。
One of the reasons why the resistant strains spread so rapidly was that they were difficult to detect.
检查你的鱼:在你吃鱼之前目视检查鱼也是有用的,但可能是不够的,因为许多寄生虫很难被发现。
Inspect your fish: Checking the fish visually before you eat it is also useful, but may be insufficient since many parasites are hard to spot.
水蒸气内的吸收光谱很容易被赫歇尔等太空望远镜发现,但水冰的吸收光谱很难被发现。
Absorption spectra of the inner water vapor are easily detected by space telescopes like Herschel, but the outer water ice is hard to spot.
胰腺癌在早期很难被发现,大多数病例在疾病开始扩散之前还不能确诊。
Because pancreatic cancer is hard to detect in the early stages, most cases are not diagnosed until the disease has started to spread.
病毒很难被发现的一个原因是,它们的体型都非常小,一般来说只有几百万分之一英寸。
One reason that viruses can be so hard to find is that they're so small- typically a few millionths of an inch across.
它们很难被发现,而且我们每天都无法诊断出严重的真菌感染,生存机会减少。
They're hard to detect and for every day we fail to diagnose a serious fungal infection, the chances of survival diminishes.
濒临绝种的小型动物在他们的自然栖息地里很难被发现,使科学人员很难监测他们并制定保护计划。
Small endangered animals are often hard to find in their natural habitats, making it difficult for scientists to monitor them and develop conservation plans.
甚至晚期卵巢癌也很难被发现,因为它也不会表现出来。
Even advanced-stage ovarian cancer is hard to detect as it also doesn't show-and-tell.
外星生物很难被发现,但也许它们已经通过脚印或者排泄物的形式给我们留下了一串线索。
Alien creatures might be tough to spot, but perhaps they have left a trail for us to follow in the form of footsteps or excrement.
这种单独的狼和小细胞的威胁很难被发现和预防,”他警告说。
And this threat of lone wolves and small cells is hard to detect and prevent," he said.
这个阶段很难被发现,因为您的记忆,注意力和注意力的变化对于医疗保健提供者来说诊断并不那么明显。
This stage is very hard to detect as changes in your memory, concentration and confusion are not so obvious for a healthcare provider to diagnose.
它们很难被发现,而且我们每天都无法诊断出严重的真菌感染,生存机会减少。
They are hard to detect, and we can't diagnose serious fungal infections every day, and the chances of survival diminish.
这种单独的狼和小细胞的威胁很难被发现和预防,”他警告说。
And this threat of lone wolves and small cells is hard to detect and prevent.”.
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