水上摩托车除了固有的操作风险外，逐渐被证明一种环境公害。
In addition to the inherent operational hazards of water scooters, they are proving to be an environmental nuisance.
然而在世界上的很多地方，麻疹病毒就是一种严重的公害。
In many parts of the world, however, measles itself is a serious hazard.
他们发现，存在于你我周围的空气里所具有的完全无公害的能量具有一种潜力，可以为无线传感设备，微型处理器以及通信电脑芯片补充电量。
They have found that by harnessing energy from the air around us could potentially power wireless sensors, microprocessors and communications chips.
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