To allow a small problem or minor evil to grow unchecked until it becomes a serious threat or major disaster; to nurture an evil until it becomes a significant danger.
当初不及时处理团队内部的小矛盾，如今长虺成蛇，问题已经变得非常棘手了。
By not addressing the minor conflicts within the team in time, they have now grown into major problems, becoming extremely difficult to handle.
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