But some question whether this expensive technology is worth it.
Testing of a £50m ultrasound system designed to stop fish being sucked into the cooling pipes of Britain's new nuclear power station has gone "really well".，更多细节参见heLLoword翻译官方下载
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As McKenzie speaks about his job, it is a stunning Antarctic summer's day, a balmy -15C. The view outside his window is a vast expanse of white as far as the eye can see, smoothed over by an equally vast layer of pure blue.