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Generally speaking, joy {#blank#}1{#/blank#} (express) by laughter. But as it turns
out, it reveals a lot more than the fact {#blank#}2{#/blank#} you are happy. It enables listeners,
even those who cannot observe you, {#blank#}3{#/blank#} (realize) if you are having a good time
with a close friend or laughing {#blank#}4{#/blank#} (polite) with a complete stranger.
At least, this is the conclusion {#blank#}5{#/blank#} (reach) by a team of scientists led by
Greg Bryant, {#blank#}6{#/blank#} assistant professor of Communication Studies at the
University of California, Los Angeles. The researchers began by {#blank#}7{#/blank#}(request) volunteers from across the
world to send them audio clips(音频剪辑) of people laughing. The 48 tapes they
received {#blank#}8{#/blank#} (range) from recent recordings of laughter between two
college friends {#blank#}9{#/blank#} ones from conversations made ten years
ago. The clips also had all possible {#blank#}10{#/blank#} (combine)--communications between
friends, strangers, all-male groups, all-female groups, etc.
Bryan says that the results of this cross-cultural
examination show that people all over the world know laughter in similar ways.