crescent moon的用法和樣例：
例句
- Friday evening, look westward soon after sunset to see the waxing crescent moon not far from the planet Saturn and star Regulus in the twilight sky.
星期五的夜晚，日落后向西看去就能看到暮色天空中距離土星和獅子座軒轅十四不遠的娥眉月。 - When the moon was crescent shaped people began to disappear.
月亮開(kāi)始呈月牙形的時(shí)候人們就開(kāi)始失蹤。
