refrigeration
n[U]
(of food, etc) refrigerating or being refrigerated, in order to freeze or preserve (指食物等)冷冻, 冷藏
Keep perishable foods under refrigeration. 把容易变质的食物冷藏起来.
[attrib 作定语]
the refrigeration industry 制冷工业.
There has long been a superstition among mariners that porpoises will save drowning men by pushing them to the surface, or protect them from sharks by surrounding them in defensive formation.