Sally Hawkins as Poppy in Happy Go Lucky. The 5-htt gene could help to explain why some people are naturally more cheerful than others. Photograph: pr.

深红色装扮的莎莉·霍金斯是个乐天派。5- HTT基因能帮助解释为什么一些人天生就比其他人更乐观。照片：pr ？

youdao

Sally Hawkins as Poppy in Happy Go Lucky. The 5-htt gene could help to explain why some people are naturally more cheerful than others. Photograph: pr.

深红色装扮的莎莉·霍金斯是个乐天派。5- HTT基因能帮助解释为什么一些人天生就比其他人更乐观。照片：pr ？

youdao