代表…（在正式或商业信函末尾置于人名前，表示代其发函）
pp is written before a person's name at the bottom of a formal or business letter in order to indicate that they have signed the letter on behalf of the person whose name appears before theirs.
例句
...J.R. Adams, pp D. Philips.
J.R.亚当斯，代表D.菲利普斯