求翻译：王慧同志系我单位正式职工，在机关工会从事生活保障工作，月收入3800元。准备于2011年12月10日--30日前往美国进行访友和旅游。特此证明是什么意思？

Comrade Wang Hui Department of my unit formally workers, trade union organizations engaged in security work life, the monthly income of 3,800 yuan. Ready at December 10, 2011 - 30 for friends and travel to the United States. Hereby certify that

Comrade Wang Hui, my units in official trade unions, trade union bodies engaged in subsistence guarantees $3800 monthly income. In preparation for December 10, 2011 - 30 and travel to travel to the United States to visit friends. THIS IS TO CERTIFY that

Comrade Wang Hui is my unit official staff, is engaged in the social security work in the institution trade union, the month income 3800 Yuan.Preparation in December 10, 2011--Before 30th carries on toward US visits friends with the traveling.Proved specially

Comrade Hui Wang is my formal workers, unions engage in subsistence support work, monthly income $ 3,800. Prepared on December 10, 2011-the 30th United States friends and traveling. This is to certify that

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