British researchers found that children who had lived within 200 metres of high voltage cables at birth faced a 69-percent higher risk of childhood leukaemia.是什么意思_British researchers found that children who had lived within 200 metres of high voltage cables at birth faced a 69-percent higher risk of childhood leukaemia.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句