Simplify the following text for a Grade 14 native English-speaking person.
Original: Russian entomologist Yuri Filipchenko ( or Philipchenko , depending on the transliteration ) first coined the terms ` macroevolution ' and ` microevolution ' in 1927 in his German language work , VariabilitÃ t und Variatio .
Simplified: Russian entomologist Yuri Filipchenko first coined the terms `` macroevolution '' and `` microevolution '' in 1927 in his German language work , `` VariabilitÃ t und Variation '' .