First, he had to establish his credentials as a researcher.
首先，他得
明自己做调查员的资
。
; 国明人的能力、资等的); 资，条件;明是真实的、可靠的或有效的;;明, 执照;;明,鉴定;明;审查委员会；件审核委员会First, he had to establish his credentials as a researcher.
首先，他得明自己做调查员的资。
The ambassador presented her credentials to the monarch.
外交官将她的明
呈交国王。
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