Is there ever a time when you want to show the translation for a word or phrase to your friend?
Google can do it. In fact, Google does it well, except some small translation errors outrage millions of Chinese people.

It is not possible to send the page after the translation to people because you can't see the query string, like this one,

After using Firefox's Live HTTP header, I successfully find the query string! http://www.google.com/translate_t?hl=en&ie=UTF8&text=you&langpair=en%7Czh-CN

hl= the interface language
ie=encoding(I think)
text=the text to translate
langpair=the original language and the translated language

For minimalists: you don't have to pass hl and ie

The Google Translate on URL is the same thing, just replace text with u and the string for test to URL.
I wish I can extract the returning page's translated string(which IS easy) and offers it as a service, people around the world will love me very much.