the ratio of the density of a substance to the density of another substance, e.g. pure water or hydrogen, taken as a standard, when both densities are measured under the same conditions
| 单词 | relative density |
| 释义 | relative densitynounthe ratio of the density of a substance to the density of another substance, e.g. pure water or hydrogen, taken as a standard, when both densities are measured under the same conditions |
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