Nitrates are used as preservatives in food processing.
硝酸盐在食品加工中被用作防腐剂。
《柯林斯英汉双解大词典》
2
Nitrates are chemicals that occur naturally in water and the soil.
硝酸盐是水和土壤里天然存在的化学物质。
《柯林斯英汉双解大词典》
3
Unlike other mice, mice that are genetically incapable of making these particular cells do not show elevated levels of nitrates when infected with bacteria.