题目内容：

谁能把这句英语的大概意思告诉我
it is important to destroy the testing documents and confirm that fact by returning letter duly signed as soon as the other bank receives the canceling letter.

优质解答

重要的是要销毁的测试文件,确认信寄回正式签署这一事实只要其他银行收到取消信.
本人才疏学浅,大概就是这么理解这句话的意思