用英语介绍一下海豹
海豹体粗圆呈纺锤形，体重20～30千克。全身披短毛，背部蓝灰色，腹部乳黄色，带有蓝黑色斑点。头近圆形，眼大而圆，无外耳廓，吻短而宽，上唇触须长而粗硬，呈念珠状。四肢均具5趾，趾间有蹼，形成鳍状肢，具锋利爪。后鳍肢大，向后延伸，尾短小而扁平。毛色随年龄变化：幼兽色深，成兽色浅。The seal body coarsefusiform, body weight 20 ~ 30 kg. The body with short, blue gray back, abdomenmilky yellow, with black spots. Head nearly round, big eyes and round, no ear,kisses short and wide, labial tentacles long and hard, in beadlike chains. Thelimbs are 5 toe, webbed toes, forming flippers, with sharp claws. After theflippers, extending back, the tail is short and flat. Hair color change withage : the cub color deep, shallow color into a beast.Seal, a meat-eating mammal found in all oceans of the world, but most abundant in Arctic and Antarctic waters. Some seals swim up rivers, and a few are found only in freshwater lakes. Probably the best-known seal species is the Californian sea lion, which is often trained to perform tricks. It is the species most often found in zoos.海豹，是一种在世界各大洋都找(看)得到的肉食性哺乳动物，而在北极和南极海域是最为丰富的。有一些海豹会游进河流里，而有一些只存在於淡水湖泊中。最知名的海豹可以算是美国加州的海狮了，它们经常受到专业的技巧训练。这也是在动物园里最常见的物种。
英语翻译
具体的翻译如下：2， In the case of a highly intelligent animal like the seal, elementary training is easy.就一个高智能动物来说，比如海狮，基本训练很容易。4， In discussing their play for the coming weekend,his son suggested they watch a football game;his daughters,on the other hand, insisted they drive to their aunt’s in the country.在讨论本周末他们会过来玩的问题上，他的儿子建议他们观看足球比赛；而他的女儿，从另一方面，则坚持要开车去乡下的姑姑家。6， She didn’t know who had sent the letter,and the envelop provided no clue.6，她不知道是谁寄来的信，（因为）信封没有提供线索。8， I have come to understand that all rights carry with them corresponding responsibilities.我已认识到，所有权利都含有与之相应的责任。10， Mr.Watt’s worst mistake lay in his belief that he would never make a mistake.Mr.Watt上最严重的错误在于，他相信他不会犯错。12， The new buildings here are all reinforced with steel,for the sake of safety in case of an earthquake.这里的所有新建筑都是用钢筋加固的，为了万一发生地震时的安全。2， This article,though very useful and informative,is much too academic for the average reader.这个文章，虽然非常很有用并且也很有信息量，但是对于一个普通读者来说，则是太学术化了。4， I can’t believe a man of your intelligence could do a thing like that.我相信像你这样智商的人是不可能做那样的事情的。6， I have been working for months to devise a way of solving this problem,but as yet I have not been successful. 我一直数月工作，就是为了找到解决这一问题的方法，但至今我还没有成功。
