H/eɪtʃ; etʃ/ abbr缩写 = (of lead used in pencils) hard (指铅笔中的铅心)硬的 an H/an HH/a 2H pencil 硬度为H[HH/2H]的铅笔. Cf 参看 B, HB.
牛津英汉双解词典