这就是从普通人区分出专业人士的秘密。

This is the one "secret" that separates a professional from the man in the street.

youdao

你最好使用代码作为你在其他专业的秘密武器（你会更有前途）。

You are much better off using code as your secretweapon in another profession.

youdao

而事实上，有些专业的魔术师，主要揭露那些声称，能和死人沟通的人的秘密。

So in fact, there are professional magicians who make it their business to debunk people who claim to genuinely be in contact with the dead and the like.

youdao

You answered that you majored in course 2. It sounds like a secret code to outsiders.

你刚才回答你的专业是课程2。这在外人听起来就像是秘密代码一样。

MIT用数字说话 - SpeakingMax英语口语达人