Self confidence, be knowledgeable about your work.

自信，对自己的工作内行。

youdao

Your job is to be knowledgeable about the company for which you're interviewing.

你的任务是对参加面试的单位有充分了解。

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My wife may not be knowledgeable about design, but if she responds to image I know others will too.

我妻子对设计并不是很了解，但是我知道她对照片作出什么样的反应，其他人也会和她一样。

youdao

In order to adequately fulfill their part, however, media professionals need to be knowledgeable on women's issues and international instruments guaranteeing them.

UNESCO: MEDIA SERVICES

The more affluent, younger consumers (half the population is under 20) tend to be knowledgeable about foreign brands but intensely proud of their own culture, says Mr Nwosu.

ECONOMIST: Advertising in Africa

Be knowledgeable within your job description, patient when dealing with a hysterical client, and seek help from co-workers or colleagues when the scenario is above your pay grade.

FORBES: How To Deal With Crazy Clients