冒然断定， 过早下结论
妄下结论

come to a conclusion leap to a conclusion bring to a conclusion a foregone conclusion arrive at a conclusion reach a conclusion draw a conclusion jump to conclusion all of a jump take a running jump jump to conclusion jump at a conclusion come to a conclusion jump to a conlusion arrival at a conclusion draw a conclusion from a foregone conclusion jump to come to the conclusion that jump to it frame-to-frame jump jump to one's feet