Recently, researchers in the US have carried out a study on laughing, one of the most natural characteristics of human behavior.

Jo-Anne Bachorowsky, a psychology professor at Vandebilt University, 36  a team of researchers who   37   a total of 11 short videos to 97 young adult volunteers in the US. They found that the participants produced a   38  of sounds when they laughed, 39  grunts(呼噜声) and snorts(哼声).

The researchers found that some of the   40   were dependent   41  gender(性别). Men laughed with grunts and snorts more often than women,   42  women’s   43   was more song-like.

They also found that people’s laughter could change,   44  who they were with at the time. Whether they were with a man or a woman and   45  person was a friend or a   46   both played a part in laughter.

The researchers found that women’s laughter was very high with a   47   pitch(音高) when they were with male strangers. And women taking   48   in the study laughed more often when they were with a male friend than when they were with a(n) 49   friend or a male stranger. But men laughed more freely with friends of either sex than with strangers of either sex.

Scientists believe that the   50   consumed in laughing 100 times is   51  to 15 minutes on an exercise bike. Another 52   of laughter is 53   it improves our mental health. Laughter reduces our levels of stress. It also helps us   54   serious illness.

  55  ,we think laughter can make us feel good.

Recently, researchers in the US have carried out a study on laughing, one of the most natural characteristics of human behavior.
Jo-Anne Bachorowsky, a psychology professor at Vandebilt University, 36  a team of researchers who   37   a total of 11 short videos to 97 young adult volunteers in the US. They found that the participants produced a   38  of sounds when they laughed, 39  grunts(呼噜声) and snorts(哼声).
The researchers found that some of the   40   were dependent   41  gender(性别). Men laughed with grunts and snorts more often than women,   42  women’s   43   was more song-like.
They also found that people’s laughter could change,   44  who they were with at the time. Whether they were with a man or a woman and   45  person was a friend or a   46   both played a part in laughter.
The researchers found that women’s laughter was very high with a   47   pitch(音高) when they were with male strangers. And women taking   48   in the study laughed more often when they were with a male friend than when they were with a(n) 49   friend or a male stranger. But men laughed more freely with friends of either sex than with strangers of either sex.
Scientists believe that the   50   consumed in laughing 100 times is   51  to 15 minutes on an exercise bike. Another 52   of laughter is 53   it improves our mental health. Laughter reduces our levels of stress. It also helps us   54   serious illness.
  55  ,we think laughter can make us feel good.