To willingly walk into a trap or snare; to bring trouble upon oneself; to fall into a predicament of one's own accord.
他因为贪图小利，轻信了陌生人的诱惑，结果自投网罗，财产蒙受了巨大损失。
Because he was greedy for small gains and easily believed the stranger's temptation, he consequently walked right into a trap and suffered significant financial losses.
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