In a cluster, it can be difficult to detect if remote applications are using local cluster queues, so careful monitoring of queues and channels may be required.

在一个集群中，可能很难探测远程应用程序是否正在使用本地集群队列，因此可能需要仔细监控队列和通道。

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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。

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Electromyographic signal is a kind of biological signal in the background full of noise, so it is somewhat difficult to detect and extract the electromyographic signal.

肌电信号的特点是强噪声背景下的生物信号，对肌电信号的检测和提取具有一定的难度。

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Few maps are made of where the mines are laid, and since the home-made varieties contain very little metal, they are extremely difficult to detect and so sensitive that even sniffer dogs can detonate them.

BBC: Farc rebels have been fighting the government for decades

For example, most of the energy from supernovae is thought to be carried away by neutrinos -- the lightweight, difficult-to-detect particles that are so important to understanding the fundamental laws of nature.

CNN: Why gamma-ray burst shocked scientists