复数：peacekeepers
n.
a member of a military force that is assigned (often with international sanction) to preserve peace in a trouble area
someone who keeps peace
"she's the peacekeeper in that family"
the pistol of a law officer in the old West
The Peacekeeper of the Immune System
Where Do the Peacekeeper Go?
Gut Microbiota: The Brain Peacekeeper
Forkhead box P3: the peacekeeper of the immune system
The psychology of the peacekeeper: Common themes and future directions.
South America's Emerging Power: Brazil as Peacekeeper
Responsibility, Nostalgia, and the Mythology of Canada as a Peacekeeper
UNknown soldier – A portrait of the Swedish peacekeeper at the threshold of the 21st century
Clinical Presentations and Treatment Outcomes of Peacekeeper Veterans With PTSD: Preliminary Findings
T-bet-/- RAG2-/- Ulcerative Colitis: the role of T-bet as a peacekeeper of host-commensal relationships
