Examples of medical modalities include chemotherapy, radiotherapy, and drug therapy.治疗程式的例子包括化学疗法、辐射疗法和药物治疗。Our society has many rituals of greeting, farewell, and celebration.我们的社会有许多关于招呼、告别和庆祝的程式。A backup copy of a computer program does not infringe copyright.计算机程式的备份版不侵犯版权。