Beyond the cloud's unusual shape, scientists see the nebula as a freeze-frame in the life of a star facing its final act. Elderly stars shed their outer layers in bursts, creating shells of gas and dust that expand. By observing the nebula at different wavelengths, researchers can sort out what material was molted first, how fast the star is losing mass, and which phase of decline Webb has caught.
未对动物采取安全措施，致使动物伤害他人的，处一千元以下罚款；情节较重的，处五日以上十日以下拘留。
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1. 患者联络员：这是两家医院独有的角色。志愿者会主动访问住院患者，倾听他们的非医疗困扰——比如觉得不舒服、想家，或是没听懂医疗术语，然后把医疗相关的问题转给专业医护人员。他们就像“额外的眼睛和耳朵”，给远离家人的老人提供情感陪伴，缓解他们的焦虑。