| 单词 |
local sidereal noon |
| 释义 |
local sidereal noon local sidereal noon[′lō·kəl sə¦dir·ē·əl ¦nün] (astronomy) Zero hour local sidereal time, or the instant the vernal equinox is over the upper branch of the local meridian; local sidereal noon at the Greenwich meridian is called Greenwich sidereal noon. |
| 随便看 |
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