One voucher per transaction only, voucher must be original copy.

Mutations in the duplicated copy were tolerated because the original copy contained genetic information for the essential gene's function.

These companies produce no original copy themselves, but are rather hired by international marketers and their advertising agencies to perform the process.

The book becomes unpopular, and the original copy begins unwriting itself.

This bootleg did not do too much to dent the value of an original copy however, which still commands a high price.