 
  
  
  
  
  
  
  
  
   
  
CORE WORDS
 
  
  COMPOUND WORDS 
conservation | {n} | (A wise use of natural resources) | conservation | {n} | (The act of preserving, guarding, or protecting) | conservationist | {n} | (A person who maintains natural areas or protects threatened species) | law of conservation of energy | {n} | (total energy remains constant) 
   5000 WORDS 
 | L123 | P5269 | (nature) conservation | der Naturschutz | 自然保护 
 | 
  PHRASES
 
  |