研究表明，人们无事可做时会感到不愉快、忧虑、孤独。
Researches show that people feel unhappy, worried and solitary when they have nothing to do.
研究表明，人们无事可做时会感到不愉快、忧虑、孤独。
Researches show that people feel unhappy, worried and solitary when they have nothing to do.
研究表明，人们无事可做时会感到不愉快、忧虑、孤独。
Research shows that people feel unhappy, worried and solitary when they have nothing to do.
研究表明，人们无事可做时会感到不愉快、忧虑、孤独。
Research shows that people feel unhappy, worried and solitary when they have nothing to do.
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