economical与thrifty这两个形容词都表示“节约的”之意。
economical : 指正当使用财物，强调节省，避免浪费。
- There's increasing demand for cars that are more economical on fuel.
对低油耗汽车的需求与日俱增。 - What's the most economical way of heating this building?
给这座楼供暖，怎样做才是最经济的方法？
thrifty : 侧重节缩开支，积蓄收入。
- They have plenty of money now, but they still tend to be thrifty.
他们现在很有钱，但仍很节俭。 - Lei Feng, always thrifty, had saved this sum from his allowances.
雷锋一向节省，这笔钱是他从津贴中省下来的。
