利用Google翻译API实现在线翻译 http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=hello 20world&hl=en&langpair=zh-CN 7Cit-http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=hello 20world&hl=en&langpair=zh-CN 7Cit