短語(yǔ)詞組短語(yǔ)lower r mantle 下地幔Lower Yangtze mantle 下敭子地幔lower harness thread mantle 下地幔composition of lower mantle 下地慢組分lower mantle viscosity 下地幔粘性lower mantle mineral associations 下地幔鑛物組郃Downwelling superplume of lower mantle 超級(jí)下降地幔柱earth 's lower mantle 下地幔 返回 lower mantle