| ประโยคภาษาจีน : 中文句子 | 
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|  kē xué jiā科学家  tōng guò通过  yán jiū研究  yì yù抑郁  fā xiàn发现  zhè xiē这些  tè dìng特定  de的  huà xué化学  wù zhì物质  zhòng diǎn重点  tiáo jié调节  qíng xù情绪  dàn shì但是  tā men他们  bú què dìng不确定  zhè xiē这些  wù zhì物质  shí jì实际  de的  gōng zuò工作  fāng shì方式 | 
| Scientists studying depression have found that these particular chemicals are involved in regulating mood, but they are unsure of the exact ways in which they work. |