1. 不可数名词：奢侈的享受，奢华
2. 可数名词：奢侈品
3. 不可数名词：不常有的了却（或享受或优势）
词形变化
- 形容词 luxurious
- 动词 luxuriate
- 复数 luxuries
- the quality possessed by something that is excessively expensive
- something that is an indulgence rather than a necessity
- wealth as evidenced by sumptuous living