sacrificially       
adverb uk/ˌsæk.rɪˈfɪʃ.əl.i/ us/ˌsæk.rəˈfɪʃ.əl.i/
 献祭地;用作祭品地
in a way that is offered as a sacrifice
  Soldiers serve their country selflessly and sacrificially to protect our freedoms. 为了保护我们的自由,士兵们无私奉献,为国捐躯。 
 See: sacrificial
 - More examples
 - You should all live sacrificially, putting others' needs before your own.
 - They sacrificially killed a goat on the altar.
 - She served others sacrificially.