Subsequently a chain of nuclear power stations was planned. Of necessity they are sited near the coasts or tidal water because of the need of much water for cooling and a certain discharge of possible radioactive effluent. (New Concept Englsih, Book 4, L. 43) [原译1]接着设计了一系列的核电站。出于需要，它们都座落在靠近海岸或潮汐水域的地方，因为需要大量冷却用水和需要排放一定量可能含有放射性的流出物。（中译本） [原译2]……出于需要，它们都建于沿海或潮水到达处附近，因为冷却需要用大量水，还可能排放出放射性废水。[《新概念英语》（四），朗文出版公司、世界图书出版公司，1993，p.190]
从译文行文来看，“出于需要”和“因为需要”，似嫌重复。根据 ALD 和 COD 的解释，of necessity = as a matter of necessity; unavoidably; logically(必然地，必定；不得已；不可避免地)。例如： With the spring festival coming soon, the traffic will of necessity become heavier. 随着春节即将到来，运输必将更加繁忙。 [试译]……它们都必须座落在靠近海岸和潮水的地方…… of one's own 见 own of the day 见 day(of the day) of which/which... of 见 about of which/whose 见 whose/of which