manteau inférieur
/sinˈys lateʁˈal ɛ̃feʁjˈœʁ/
n
English: lower mantle · 下地幔
Sens：Little-known layer with a thickness of about 2,290 km; its slow-moving currents, called convention currents, are caused by temperature variations.
English: lower mantle · 下地幔