秋千在夕阳下静静地悬挂着。

The ___swings hang quietly in the sunset.

秋千在微风中轻轻摇摆。

The ___swings sway gently in the breeze.

秋千在风中轻轻摇摆。

The ___swings move gently in the breeze.

孩子们的情绪总是变化无常，一会儿哭一会儿笑。

Kids' moods ___swing quickly, from crying to laughing in seconds.