1 . Over the past century, science has made lots of advances in understanding the meanings of body language. Here are some of the most useful findings.

Open palm(手掌)

Have you noticed how someone swears to tell the truth in a court of law? He usually puts one hand on a religious book and raises the other hand into the air, palm facing whoever he is speaking to. He does this because an open palm has been associated with truth and honesty throughout our history.     1     . So we cannot be a threat to anyone.

Finger pointing

If someone is closing their palm and pointing with their index finger, then he is trying to display power, though it doesn’t always work out. Psychologists say, the pointed finger is used like a symbolic stick with which the speaker tries to beat his listeners.     2     .

Forced smile

Researchers say, smile is all about the lines around the eyes.     3     . If he is trying to force a smile, you won’t see the lines and the facial expression tends to be very awkward. Making a genuine smile-also known as a Duchenne smile-is nearly impossible to do on command. So look for a lack of lines around the eyes to detect a forced smile.

    4    

In the same way that real smiles shape the lines around the eyes, worry, shock or fear can cause people to raise their eyebrows in discomfort. So if someone praises your new hairstyle or clothes with his eyebrows raised, he or she may not be sincere.

Crossed arms

    5     While crossed arms typically indicate that someone is closed off, people are also more likely to cross their arms when it’s cold and when their chair doesn’t have an armrest. Be aware of the environment before making a decision or changing strategy based on these types of behaviors.