A thing or medicine that reduces pain, distress, or pressure.

能缓解疼痛、压力或不适的事物或药物。

A baseball pitcher who replaces another to finish or steady the game.

在比赛中替换他人出场的后援投手。

A person who temporarily takes over another’s duties or shift.

临时接替他人岗位或班次的人员。

A spare garment kept to be lent out when needed.

备用以便需要时借给他人的衣物。