sidereal day
短语n. 恒星日（较标准日约短四分钟）
词形变化
sidereal days
复数
sidereal days
释义与例句
n.
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1.
One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds).
恒星日
天文 -
2.
The rotational period of Earth; the time in which Earth rotates around its axis 360 degrees.
天文