I do not know whether you realize it, but this condition is essential to us.
我不知道你是否了解,但是,这个条件对我们是必要的。
In 1953, a former electronics engineer in his fifties, Christopher Cockerell,who had turned to boat-building on the Norfolk Broads,
在1953年,有一位50多岁名叫克里斯托弗·科克雷尔的原电子工程师,改行在诺福克郡的湖泊地区从事造船业,