moon首字母為什麼不大寫

因為它不是專有名詞。

n. 月亮月球月光衞星

vi. 閒蕩出神

vt. 虛度Our way was lit by a full moon.

一輪明月照亮了我們的路。

The moon is in its first quarter.

月亮正處於上弦。

The moon is a satellite of earth.

月球是地球的衞星。

The moon was full， the sky clear.

圓月碧空。

The moon was rising in the inky sky.

月亮升起在墨似的夜空中。