| 单词 |
gravitational systems of units |
| 释义 |
gravitational systems of units gravitational systems of units[‚grav·ə′tā·shən·əl ¦sis·təmz əv ′yü·nəts] (mechanics) Systems in which length, force, and time are regarded as fundamental, and the unit of force is the gravitational force on a standard body at a specified location on the earth's surface. |
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