n.

1. 憑據，紀錄，資格；證明，證明文件
   The candidates for the job will firstly be evaluated by their academic credentials.

   應徵這份工作的人首先會依他們的學術紀錄來評估。

2. 國書（委任國元首發給地主國元首的公使介紹信或委任狀）
   The new Ambassador to the UK presented his credentials to the Queen.

   新任駐英大使把他的國書呈交給女王。

n.

1. a qualification, achievement, etc., especially when used to indicate a person's suitability for something.
2. a letter of introduction given by a government to an ambassador before a new posting.