卷起你的袖子。今天是世界献血日。

Roll up your sleeves; it's world blood donor day.

youdao

那年我高一，志愿者的任务是宣传一些有关献血的知识，因为那天恰巧是世界献血日。

I was in the first year of senior middle school at that time and the task was to propagate blood donation, for that day was the "blood donation day".

youdao

世界献血日是那些通过经常和自愿贡献其血液而直接对拯救和改善上百万病人生命负有直接责任的人们的庆典。

World Blood Donor Day is a celebration of those who are directly responsible for saving or improving the lives of millions of patients by giving their blood regularly and voluntarily.

youdao