ponder

考虑，沉思英释vvto spend time thinking carefully and seriously about a problem, a difficult question, or something that has happened

The professor found himself constantly ______ the question：“How could anyone do these things?”句意： 教授发现自己不断地思索这个问题： “人怎么能做这些事情呢?”preside： 主持； pore： 细想， 沉思； presume： 假定， 假设。314presuming

1 ponder over,深思，沉思；考虑

1 He continued to ponder the problem as he walked home..他一边往家走一边继续思考那个问题。