月亮在夜空中划出一道美丽的弧线。

The moon drew a beautiful ___arc across the night sky.

这部电影的主角经历了从自信到崩溃再到重生的完整成长历程。

The protagonist in this movie has a complete emotional ___arc from confidence to breakdown and finally to rebirth.

石头在空中划出一道优美的弧线落入水中。

The stone traced a graceful ___arc through the air before landing in the water.