The company is looking for a way to ____ their products without increasing the cost.
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As China has ____ natural conditions across its land, Chinese people living in different areas enjoy different but rich staple food (主食).
Having a long history and many different types, cuisine has been ____ to an irreplaceable status in China.
Food ____ Annie Gray says food symbolism has a lot to do with religion.
Once formed, ____ habits can be very difficult to change.