“小龙虾”英语怎么说

　　名词解释：小龙虾(学名：Procambarus clarkii)：也称克氏原螯虾、红螯虾和淡水小龙虾。形似虾而甲壳坚硬。成体长约5.6~11.9厘米，暗红色，甲壳部分近黑色，腹部背面有一楔形条纹。幼虾体为均匀的灰色，有时具黑色波纹。螯狭长。甲壳中部不被网眼状空隙分隔，甲壳上明显具颗粒。额剑具侧棘或额剑端部具刻痕。你知道用英语怎么表达吗?

　　The North American signal crayfish, which had been introduced to English waters decades ago and spread steadily north, were taking over.

　　Some of these things were about 10 to 12 inches long. At that size, they don't even look like crayfish; they look like lobsters.

　　The problem isn't just the size or quantity of the intruders; it's that the crayfish eat the same insects and larvae as the prize-winning trout that are native to these streams.

　　Many local residents are worried that the crayfish may be destroying Scottish ecology.

　　北美标志性的小龙虾是在数十年前被引入英国境内，并且向北蔓延，最后占据了水域。

　　有一些小龙虾都能长到10到12英寸。有着这样的尺寸，它们甚至看起来都不像小龙虾，而更像大龙虾。

　　问题不是只在于这些入侵者的尺寸或者数量，而是这些小龙虾会吃掉同样生活在这片水域的鳟鱼赖以为生的昆虫和幼虫。

　　许多当地的居民都担心这些小龙虾可能会毁掉苏格兰的生态。

　　【讲解】

　　文中的crayfish就是“小龙虾”的意思，也称红螯虾和淡水小龙虾，因肉味鲜美广受人们欢迎，尤其是麻辣小龙虾(hot and spicy crayfish)，而龙虾(lobster)主要分布于热带海域(tropical seas)，是名贵的海产品(marine product)。

　　第三段中的trout解释为“鳟鱼”，是一类很有价值的垂钓鱼和食用鱼，类似的垂钓鱼还有：grouper(石斑鱼)、tuna(金枪鱼)、cod(鳕鱼)等。