查词历史:
- betterment betterment cost better
n.
- 复数: betterments
- Noun
-
1. a change for the better; progress in development
- synonym: improvement,advance
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2. an improvement that adds to the value of a property or facility
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3. the act of relieving ills and changing for the better
- synonym: amelioration,melioration
法律
- 1.改良


