ideas or plans that are quixotic are not practical and usually do not succeed （想法或计划）不切实际的，堂吉诃德式的
a quixotic scheme to end the violence 结束暴力的一个不切实际的计划
Word story: quixotic
From the name of the main character in the 17th-century Spanish novel Don Quixote by Cervantes. Don Quixote has a romantic view of life and is full of ideas that are not practical.