Space tomatoes stay fresh for twenty days, which is one week longer than normal tomatoes.

太空西红柿可以保持新鲜二十天，这个时间比普通番茄要长一周。

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Tenith Adithyaa, a teenager from India, used UV to make the leaves stay fresh for a year.

来自印度的青少年 Tenith Adithyaa 利用紫外线使这些叶子保持新鲜一年。

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It is not easy to stay fresh for long.

要长时间保鲜不容易。

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At this office, you worked only from 8:30 in the morning until 4 in the afternoon because your boss wanted you to stay fresh and eager.

VOA: standard.2010.03.08

Items like lettuce stay fresh for a month instead of two or three days.

FORBES: Upsetting the apple cart

When consumers see a resealable pack they often think the product will stay fresh longer.

WSJ: Overeating: The Psychology of Small Packages

The evolving nature of a museum's collection and exhibitions helps him to stay fresh.

WSJ: Remco van Vliet, the Master Builder of Towers of Flowers | Creating