private function _baiduDic($keyword) 
    {
        $tranurlaip = "http://openapi.baidu.com/public/2.0/bmt/translate?client_id=9peNkh97N6B9GGj9zBke9tGQ&q={$keyword}&from=auto&to=auto";   //翻译URLapi地址
        $transtr = file_get_contents($tranurlaip);
        $transon = json_decode($transtr);
        $contentStr = $transon->trans_result[0]->dst;      
        return $contentStr;
    }