The key of keeping fresh lettuce under cold chain is pre-cooling.
结球生菜冷链流通保鲜的关键是预冷。
Keeping your body healthy may help you maintain a fresh complexion.
身体健康的外在表现便是气色清新。
The problem I ran into is keeping it fresh.
我遇上的问题是如何保持创作常新。
This is a very important part of keeping your teaching fresh and interesting.
这个非常重要，因为可以保持每次的学习新鲜有趣。
Fresh progress has been made in keeping public order through comprehensive measures.
社会治安综合治理取得新成效。
Fresh progress has been made in keeping public order through comprehensive measures.
社会治安综合治理取得新成效。
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