名詞 alteration:

1. an event that occurs when something passes from one state or phase to another
   同義詞：change, modification
2. the act of making something different (as e.g. the size of a garment)
   同義詞：modification, adjustment
3. the act of revising or altering (involving reconsideration and modification)
   同義詞：revision

1. The timetable is subject to alteration.
   時刻表有可能更改。
2. There is a structural alteration to the building.
   這座建筑物在這有一處結構上的改變。
3. My coat needs alteration.
   我的上衣需要改改。
4. There have been a few alterations to the timetable.
   時間表上有一些變動。