First, he had to establish his credentials as a researcher.
首先，他得证明自己做调查员的资格。
,信任状, 执照;;
可证;
件;，
证;First, he had to establish his credentials as a researcher.
首先，他得证明自己做调查员的资格。
The ambassador presented her credentials to the monarch.
外交官将她的证明
呈交国王。
声明：以上例句、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若现问题，欢迎向我们指正。
