How to add Multi keyword paramter into this method.

[geniusfox]

Hi all
i generate client code with soap4r 1.5.6 on "https://api.baidu.com/
sem/classic/v4/?class=KeywordService&wsdl". i want user
"updateKeywords" method. In KeywordService.rb defination is :
# {https://api.baidu.com/sem/classic/v4}updateKeywordsRequest
class UpdateKeywordsRequest < ::Array
end

My code as :
array_kws = Array.new
array_kws << "<keywordId>123</keywordId><url>www.google.com</url>"
keyword_service.updateKeywords(:keywords=>array_kws)

This code work well, but i want update multi keywods in one time,
How to wirte it?