帮我翻译一段话，谢谢，汉译英，感激不尽
朋友还特地为我挑选了一部电子翻译辞典。它的功能很强大。可以双向整句翻译，真人发音和手写输入，还可以学习9国语言。给我的学习带来很大的帮助。我希望尽快学好英语，这样我们就可以方便的交谈了。
My friend picked a electronic book especially for me。It has varietes of functions ,for example,it can translate the whole sentenses both into English and Chinese,and it can also pronounce exactly like real man 。
Besides it allows to be written by hands。The most fantasy function is that I can learn 9 different languages by it and it really help me a lot。
I hope that I will be good at English as quickly as I can,then,we can communicate with each other more conviniently。
答：(We should) set up an index system to evaluate the urban ecological networks. Th...详情>>
