nitrates in sth
表示某物（水、土壤、食物等）中所含的硝酸盐时，常用复数 nitrates 后接 in 短语。
High levels of nitrates in drinking water can be harmful to babies.
饮用水中硝酸盐含量过高可能对婴儿有害。
硝酸的盐或酯。；含有硝酸基的任何化合物(如硝酸盐或硝酸酯)；硝酸盐；[化] 硝酸盐(或酯)
a salt or ester of nitric acid
硝酸的盐或酯。
Any salt or ester of nitric acid.
含有硝酸基的任何化合物(如硝酸盐或硝酸酯)
any compound containing the nitrate group (such as a salt or ester of nitric acid)
Farmers often add nitrate to the soil to help crops grow.
农民常在土壤中加入硝酸盐以帮助作物生长。
用法提示：此处nitrate作不可数名词，指硝酸盐这种化学物质。
Some processed meats contain nitrates to prevent bacteria from growing.
一些加工肉类含有硝酸盐，以防止细菌滋生。
用法提示：此处nitrates为复数形式，指多种硝酸盐化合物。
The lab report showed a high level of nitrate in the river water.
实验室报告显示河水中的硝酸盐含量很高。
用法提示：此处nitrate作不可数名词，强调作为物质的硝酸盐。
表示某物（水、土壤、食物等）中所含的硝酸盐时，常用复数 nitrates 后接 in 短语。
High levels of nitrates in drinking water can be harmful to babies.
饮用水中硝酸盐含量过高可能对婴儿有害。
具体硝酸盐的名称一般由金属或元素名加 nitrate 构成，如 silver nitrate（硝酸银）。
Potassium nitrate is a key ingredient in some fertilizers.
硝酸钾是某些肥料的关键成分。
nitrate 可直接放在名词前作定语，说明该事物与硝酸盐有关，如 nitrate pollution、nitrate levels。
Nitrate pollution from farms has damaged many rivers.
来自农场的硝酸盐污染破坏了许多河流。
grammar · medium
易错句子Nitrate are widely used in fertilizers and explosives.
正确表达Nitrates are widely used in fertilizers and explosives.
nitrate 是可数名词，主语的数必须与动词一致：用复数主语 nitrates 才能配 are。若想用单数，应写成 Nitrate is widely used…，不能单数形式配复数动词。
grammar · medium
易错句子Too much nitrates in drinking water can harm babies.
正确表达Too many nitrates in drinking water can harm babies.
much 只能修饰不可数名词，而 nitrates 是复数可数名词，须用 many。若把 nitrate 当作不可数的物质名词，则应说 too much nitrate，但不能再保留复数词尾 -s。
grammar · medium
易错句子The report warns about nitrates pollution in rivers.
正确表达The report warns about nitrate pollution in rivers.
英语中名词作定语修饰另一个名词时通常用单数形式，nitrate pollution（硝酸盐污染）是固定搭配，不能写成 nitrates pollution。
硝酸银
Silver nitrate is still used in some medical treatments.
硝酸银至今仍用于某些医学治疗中。
硝酸铵
The warehouse stored large quantities of ammonium nitrate.
仓库里存放着大量硝酸铵。
硝酸钾
Potassium nitrate is a key ingredient in gunpowder.
硝酸钾是火药的关键成分。
硝酸盐含量
Nitrate levels in the river have risen sharply.
河水的硝酸盐含量急剧上升。
硝酸盐污染
Fertilizers are a major source of nitrate pollution in groundwater.
化肥是地下水硝酸盐污染的主要来源。
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