那些有助人为乐行为的人，无论是自愿为别人提供息身之地还是帮朋友摆脱困境，报告显示他们的幸福感有所提高。
People who perform selfless ACTS of kindness, whether by volunteering for a shelter or just helping out a friend, raised their reported level of happiness.
有些孩子，比如11岁的桑切斯，则像交响乐指挥家一样手臂在空中摇摆着，帮自己掌握汉语的声调。
Some, like Damaris De Luna Sanchez, 11, move their hands the way a conductor directs an orchestra, slicing through the air to help them reach the proper intonations.
这只黑猩猩还有一个韩文名字“达乐”，她的训练员帮她满足抽烟的习惯(提供烟和打火机)。
The chimp also goes by the Korean name Dalle, and her trainer helps feed her habit.
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