any substance used to provide cooling (as in a refrigerator)
造句
It will take time to replace HFCs by more preferable substances such as natural refrigerants. 因此，深入了解這些常用制冷劑的基本熱物理性質(zhì)不僅對(duì)于完善現(xiàn)有物質(zhì)的基礎(chǔ)實(shí)驗(yàn)數(shù)據(jù)具有重要意義，而且也是今后制冷劑替代研究的基礎(chǔ)。