USCIS 官方的I-539 填写指南对此说明如下：
Translations. Any document you submit to USCIS with information in a foreign language must be accompanied by a full English translation. The translator must certify that the English language translation is complete and accurate, and that he or she is competent to translate from the foreign language into English.
CERTIFICATION BY TRANSLATOR
This is to certify that I am competent to translate from Chinese into English and that the above translation is accurate.
Printed Name: Cell: