过去式： thought；过去分词： thought；
think
v.认为;以为;想;思考;思索;思想;琢磨；
n.想;想法；
第三人称单数： thinks；现在分词： thinking
What in the world did they think they were doing?
他们到底认为自己在做什么？
I think we should go back to first principles.
我认为我们应该回到基本原则上。
I always think of you as one of the family.
我一直把你当成自家人。
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