1·The vacuum freshness preservation box comprises a box body, a cover body, an inflating valve and an air pumping valve.
真空保鲜盒包括盒体，盖体，充气阀和抽气阀。
2·Water is a substance which cuisine cannot be short of. It plays the role of heat conduction, solution, dispersion and freshness preservation.
水是烹饪中不可或缺的物质，它具有传热、溶解分散、清洁防腐作用。
3·The most important breakthrough of the high-speed cooling machine in 2009 is to raise the original taste and freshness preservation by 80%. Any ordinary eater will be able to tell the different.
急速冷却机2009年最大突破是将原味、鲜味保留提高80%，即使不挑嘴的客户也能分辨出差异性。
4·Pretreatment with 6-BA is recommended as an effective measure for their freshness-preservation.
BA预处理月季切花，是干藏保鲜的有效措施。