muse

他坐在码头上，沉思着自己人生的方向。

He sat on the dock and ___mused about the direction his life was taking.

她对着那些旧信件沉思，想象如果当初选择不同会怎样。

She ___mused over the old letters, wondering what might have been.

独自走在博物馆里，他思索着人类成就的短暂本质。

Walking alone in the museum, he ___mused on the fleeting nature of human achievement.