| ประโยคภาษาจีน : 中文句子 | 
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|  xiàng xīn lì向心力  hé和  lí xīn lì离心力  hù xiāng互相  duì zhì对峙  de的  yuán gù缘故  suì遂  néng能  shǐ使  xíng xīng行星  zài guǐ在轨  dào shàng道上  xíng dòng行动 | 
| The centripetal and centrifugal forces acting in opposition to each other keep our planet in her orbit. |