First, he had to establish his credentials as a researcher.
首先，他得
自己做调查员的资
。
;
;书, 执照;,鉴定;书;;，
件;书，学位书;是真实的、可靠的
有
的;,能力,作能力;First, he had to establish his credentials as a researcher.
首先，他得自己做调查员的资。
The ambassador presented her credentials to the monarch.
外交官将她的书呈交国王。
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false
