A letter purporting to come from his father .

声称来自他父亲的一封信。

An announcement purporting to come from the group was posted on the internet .

因特网上发布了一则据称是来自该组织的公告。

Differing accounts purporting to be from witnesses have appeared in pakistani and arab media , and on the internet .

看来，从不同的帐户中出现了证人是巴基斯坦和阿拉伯媒体和互联网上。

Statements purporting to discharge an obligation by equivalent means .

旨在以相当方式履行义务的声明。

They have published stacks of studies ( and a book ) purporting to show that minimum wages hit jobs .

他们发布了大量的研究成果（以及一本书）意图说明最低工资会减少就业机会。