The fish lobby points out that the USGS findings do not necessarily damn the commercial fish industry, as most of the fish people eat comes from the ocean and not from freshwater streams. But mercury levels are high in marine fish, too—particularly in larger species, such as shark, tuna and swordfish. Mercury accumulates as it works its way up the food chain. A report released earlier this year by Harvard and the USGS forecasts that mercury levels in the Pacific Ocean will rise by 50% by 2050 as emissions from coal-fired power plants increase.
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Mercury levels are high in marine fish, too—particularly in larger species, such as shark, tuna, and swordfish.
海洋鱼类中的汞含量也很高——尤其在体型较大的鱼类体内，如鲨鱼、金枪鱼和旗鱼。
Avoiding RAID5 (unless it's used with an efficient storage device such as Shark).
避免RAID5(除非是与像Shark这样有效的存储设备一起使用)。
But other compounds found in dolphin blubber may explain why injuries such as shark bites aren't a death sentence.
但是，人们在海豚的鲸脂内发现了另一种化学物质，它或许可以解释为什么海豚在受伤后，比如说被鲨鱼咬过后不会致死。
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