It's important that chain stores keep a uniform taste.
It's important that chain stores maintain a consistency in taste.
「チェーン店は味を一定に保つことが大切です」:
It's important that chain stores keep a uniform taste.
It's important that chain stores maintain a consistency in taste.
一定な味 : a uniform taste / a consistency in taste.
保つ : to keep / to maintain.
「チェーン店へ行くお客さんは同じ味を求めて来店する」
customers going to chainstores seek/demand the same taste.
It is important for the franchised restaurants to keep the recipes steady.
チェーン店ではレシピをしっかりと固定することが大切です。
Franchised restaurant
チェーン店
Steady
しっかりと固定した
ぐらつかない
参考になれば幸いです。