It is rare to improve the quality
Structural frame evaluating an action via the adjective 'rare'.
In such cheap products, it is rare to improve the quality without raising the price.
—Did they change anything? —Not much, it is rare to improve the quality in this range.
The food critic comments that it is rare to improve the quality of fast food.
In such cheap products, it is rare to improve the quality without raising the price.
—Did they change anything? —Not much, it is rare to improve the quality in this range.
The food critic comments that it is rare to improve the quality of fast food.