| 释义 |
同义词- gas constant
- r
- radius
- roentgen
- universal gas constant
词路径- entity
- abstraction
- abstract entity
- measure
- quantity
- amount
- definite quantity
- unit of measurement
- unit
- electromagnetic unit
- emu
- radioactivity unit
- roentgen
- R
上位词- alphabetic character
- constant
- length
- letter
- letter of the alphabet
- radioactivity unit
下位词- radius of curvature
- semidiameter
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