因为它不是专有名词。
n. 月亮月球月光卫星
vi. 闲荡出神
vt. 虚度Our way was lit by a full moon.
一轮明月照亮了我们的路。
The moon is in its first quarter.
月亮正处于上弦。
The moon is a satellite of earth.
月球是地球的卫星。
The moon was full， the sky clear.
圆月碧空。
The moon was rising in the inky sky.
月亮升起在墨似的夜空中。
