sub-grade

基本解释

• n.路基

同根派生

英汉例句

• Pupils who pass the test will be promoted to the next higher grade.
  小學生衹要考試及格就會陞到高年級。
• I had to sub for the referee, who was sick.
  裁判病了，我得代爲裁判。
• Standard sub micron grade for solid rotary tool applications.
  是適用於可轉位工具的晶粒度爲亞微米級的標準牌號。
• He's not in the first grade as a musician.
  他不是第一流的音樂家。
• Business is now on the up grade.
  目前生意蒸蒸日上。