lost cause

n.

注定要失败的努力（或行动）；

复数：lost causes

Lost cause
Lost Cause
Lost cause
Our Lost Cause Found
Lost Cause | I Like To Write Poetry
LOST Becomes a Lost Cause
Primary-care research is not a lost cause.
Primary care's lost cause? Not all those who wander are lost
Over-diagnosis of malaria is not a lost cause
Social Issues and Management: Our Lost Cause Found
Eldercare in the United States: Inadequate, Inequitable, but Not a Lost Cause
Enteroviruses as causative agents in type 1 diabetes: loose ends or lost cause?
Cyclooxygenase as a target for chemoprevention in colorectal cancer: lost cause or a concept coming of age?