Disaster rescue, by its very nature is a high-risk activity.

本质上，灾难救援是一项高度危险的行动。

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Enterprise merger is the main mode of capital operation and high-risk activity.

企业并购是资本运营的主要方式，也是一项高风险的经济活动。

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However, technological innovation is a kind of high risk activity, which limits the enterprises' development of technological innovation to a great extent.

然而，技术创新又是一项高风险活动，技术创新的这种高风险性在很大程度上制约了企业技术创新活动的进展。

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Laura Middleton says the research showed that even low-intensity activity reduced the risk of thinking problems and memory loss.

VOA: special.2011.07.27

Inspectors made unannounced visits to ensure companies are managing high-risk activity, such as working at height.

BBC: HSE fails quarter of London building site safety checks

Let's prohibit them from really high-risk activity.

FORBES: Magazine Article

"This fly-by is a very high-risk space activity, " said the mission's chief engineer, Marc Rayman.

CNN: Spacecraft set for risky asteroid flyby