endoderm,entoblast，endoderm
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- old plate tectonics
- artificial radioactive element
- organoclay
- greenwich meridian
- discharge hydrograph
- temperature barrier
- soil subtype
- precision processing
- sial
- ala twin
- rock terrace
- Suspended solids
- descloizite
- cuesta
- acid geochemical barrier
- limonite
- ferganite
- speciation
- volcanic ejecta
- layering of relief