think of的同义词转换为ponder
例句
1、
I found myself constantly pondering the question: 'How could anyone do these things?'
我发现自己总在思考这个问题：“怎么会有人做出这样的事情呢”
2、
There was a deep frown on his face when he was pondering a problem.
当他思考问题时，他双眉深锁。
3、
They are pondering whether the money could be better used elsewhere.
他们正在斟酌能否把钱花到其他更适当的地方。