首先，要采用新鲜的材料。
The problem I ran into is keeping it fresh.
我遇上的问题是如何保持创作常新。
Keep it fresh. Do different things, go different places and try something new.
保持新鲜感，避免一成不变：做不同的事情，去不同的地方，尝试新事物。
One of the most important things about content is to keep it fresh and up-to-date.
有关内容方面最重要的一件事情是保持内容的新鲜并不断更新。
Chocolate is wrapped in foil to keep it fresh.
为保新鲜，巧克力用箔纸包起来。
Deepfreezing food by using liquid nitrogen is a new effective method to keep it fresh.
用液氮快速冻结食品是保鲜新技术之一。
In hot weather it is rather difficult to preserve food and keep it fresh and safe to eat.
热天很难保藏食品，使之保持新鲜与食用安全。
In hot weather it is rather difficult to preserve food and keep it fresh and safe to eat.
热天很难保藏食品，使之保持新鲜与食用安全。
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