5H

名词 n.
中文释义

英文释义

名词 n.
  1. A grade of pencil with lead that makes lighter marks than a pencil grade 4H but darker marks than a pencil of grade 6H; a pencil with very hard lead. British,English,uncountable,usually
  2. A pencil of the grade 5H. uncountable,usually

词形变化

5Hs plural
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