observance
- n. 惯例；遵守；仪式；庆祝
英英释意
- 1. the act of observing; taking a patient look
- 2. a formal event performed on a special occasion;
- "a ceremony commemorating Pearl Harbor"
- 3. the act of noticing or paying attention;
- "he escaped the notice of the police"
- 4. conformity with law or custom or practice etc.