low-grade

low-grade
adjective
  1. of low quality or strength
    质量差的,劣等的;低强度的
    low-grade steel.
    劣质钢铁。
    low-grade fuels.
    劣质燃料。
    ■at a low level in a salary or employment structure
    低级的,低等的
    low-grade clerical jobs.
    低级牧师工作。
    ■(of a medical condition) of a less serious kind; minor
    (医疗状况)不严重的;轻微的
    a low-grade malignancy.
    (程度)轻度恶性。
英语宝典
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