将下面的JS保存为书签，打开欲翻译的网页，点击标签就可以了。
javascript:var t=((window.getSelection&&window.getSelection())||(document.getSelection&&document.getSelection())||(document.selection&&document.selection.createRange&&document.selection.createRange().text));var e=(document.charset||document.characterSet);if(t!=''){location.href='http://translate.google.com/?text='+t+'&hl=zh-CN&langpair=auto|zh-CN&tbb=1&ie='+e;}else{location.href='http://translate.google.com/translate?u='+encodeURIComponent(location.href)+'&hl=zh-CN&langpair=auto|zh-CN&tbb=1&ie='+e;};