World blood donor Day is celebrated each year to highlight the contribution voluntary unpaid blooddonors make to public health.
每年庆祝的世界献血者日是为了突出自愿无偿献血者对公共卫生作出的贡献。
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Blood transfusion out of health considerations, the compulsory part of the groups excluded from the blooddonors in addition to the practice is understandable.