As far as my level of English is concerned, I have obtained my Cambridge Examination and I enclose a photocopy of the certificate.

photocopy 是由前缀 photo-（表示"光、照片"）和名词 copy（"副本"）组成的复合词，字面意思是"用光学方式制作的副本"，即"复印件"。这种复制方式通常是通过扫描或拍照来实现的。