bystander

1. Police warned bystander to keep away from the blazing building.
   警察告诫围观者，不要靠近燃烧的建筑物。
2. I was nothing more than an innocent bystander.
   我只是一个无辜的看热闹的人而已。

Studies of bystander effects in human fibroblasts using a charged particle microbeamInduction of Bystander T Cell Proliferation by Viruses and Type I Interferon in VivoNF-κB: pivotal mediator or innocent bystander in atherogenesis?The "bystander effect": tumor regression when a fraction of the tumor mass is genetically modified.Adaptive Response and the Bystander Effect Induced by Radiation in C3H 10T½ Cells in CultureInflammation in Alzheimer disease: driving force, bystander or beneficial response?Counting Antigen-Specific CD8 T Cells: A Reevaluation of Bystander Activation during Viral InfectionApoptosis occurs predominantly in bystander cells and not in productively infected cells of HIV- and SIV-infected lymph nodesIncrease in survival and bystander CPR in out-of-hospital shockable arrhythmia: bystander CPR and female gender are predictors of im...Non-targeted and delayed effects of exposure to ionizing radiation: I. Radiation-induced genomic instability and bystander effects i...