First, he had to establish his credentials as a researcher.
首先，他得
明自己做调查员
资
。
; 国明人
能力、资等); 资，条件;明是真实、可靠或有效;
;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资。
The ambassador presented her credentials to the monarch.
外交官将她明
呈交国王。
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