1. Despite her repeated warnings, her advice went unheeded and they made the same mistake again.
尽管她再三警告，她的建议毫无人理会，他们再次犯了同样的错误。
2. The cries for help from the stranded hikers went unheeded until it was almost too late.
被困的徒步旅行者的求救呼声未被理会，直到几乎已经晚了。