low-grade + noun
表示“轻度的”时，常用于疾病或症状。
The hospital admitted a patient with a low-grade fever.
医院收治了一名轻度发热的病人。
低质量的；劣质的
轻微的；不严重的；坡度小的；近乎水平的；轻度的；次要的；坡度小的；几乎水平的。
低质量的；劣质的
Of inferior quality.
低质量的
of inferior quality
轻度的；次要的
Minor.
坡度小的；几乎水平的。
Not steep; nearly level (having a low grade).
The school was criticized for using low-grade materials in the new building.
这所学校因在新建筑中使用劣质材料而受到批评。
用法提示：这里 low-grade 表示劣等的，修饰 materials。
The patient had a low-grade fever for two days.
病人持续两天发低烧。
用法提示：这里 low-grade 表示轻度的，修饰 fever。
She refused to buy low-grade produce at the market.
她拒绝在市场上购买劣质农产品。
用法提示：这里 low-grade 表示低级的、劣质的，修饰 produce。
表示“轻度的”时，常用于疾病或症状。
The hospital admitted a patient with a low-grade fever.
医院收治了一名轻度发热的病人。
表示“劣质的”时，常用于产品、材料等。
They sold low-grade materials to cut costs.
他们出售劣质材料以降低成本。
也可作表语，表示某物属于低等或劣质。
This product is low-grade and not suitable for export.
这个产品是劣质的，不适合出口。
grammar · medium
易错句子This product is a low-grade.
正确表达This product is low-grade.
“low-grade”是形容词，不能直接用作名词。中文学习者可能受“低级”的名词用法影响而误用冠词。应去掉冠词，直接用形容词作表语。
grammar · medium
易错句子He got a low-grade job.
正确表达He got a low-level job.
“low-grade”通常表示质量低劣或程度轻微，不用于描述职位等级。描述职位低时应使用“low-level”。中文学习者可能混淆了“低级”的两个含义。
low-grade 强调等级或程度上偏低（如轻度感染），而 low-quality 仅指品质低劣，无程度含义。
low-grade 用于描述程度较低（如低度发烧），而 mild 强调性质温和、不严重，但可能用于更广范围（如 mild illness）。
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