As Goethe says "the theories is gray, the tree of life is evergreen."

正如歌德所言“理论是灰色的，生命之树常青。”

youdao

As Goethe says "the theories is gray, the tree of life is evergreen."

正如歌德所言“理论是灰色的，生命之树常青。”

youdao