Some people are so terribly insincere you can never tell if they are telling the truth.

有些人虚伪得可怕，你绝对无法搞清楚他们是否在讲真话。

《柯林斯英汉双解大词典》

Smile when you are introduced to someone but don’t keep a smile plastered on your face, you’ll seem insincere.

当你被介绍给其他人时，保持微笑。 但笑容要自然，而不能像石膏一样僵硬，那会让你显得很虚伪。

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If you fail to make eye contact you will be seen as insincere and untrustworthy.

如果你避免眼神的交流，别人就会认为你不真诚、不值得信任。

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So how can you tell if a job posting is insincere?

WSJ: Fake Job Postings Dot Popular Job Boards

Attack it directly, or rope-a-dope it with insincere calls for more studies, as you've been doing.

FORBES: Digital Rules

"If you're filming in London people are so often insincere because they are taken over by the crews, " he said.

BBC: Newsbeat - Entertainment - Jamie Oliver defends new series