1. 形容詞
   用不完的, 用之不竭的
   無窮無盡的
   不會疲勞的, 不知疲倦的
   不倦的
   

   同義字詞
   indefatigable,tireless,unflagging,untiring,weariless
   

例句

1. The study of holiness is inexhaustible .
2. Joy is inexhaustible , unlike seriousness.
3. The fountain is inexhaustible , it is Christ.
4. It's amazing how inexhaustible our energy was.
5. The sun seems an inexhaustible source of energy.
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