prior/priority

prior /ˈpraiə/ adj. 优先的，在前的：prior claims 优先要求权  ［考句］ Because of a prior engagement, Lora couldn’t attend my birthday party last Saturday.由于另有预约，洛拉不能够参加我上个周六的生日聚会。prior to 在…之前：［考句］All the arrangements should be completed prior to your departure.在你离开前所有安排的事情都应该完成。

 priority /praiˈɔrəti/ n. 1.［u］优先(权)，重点: enjoy priority in…在…方面享有优先权；give priority to…把优先权给与…［考句］The problem requiring immediate solution will be given priority at the meeting.这个急待解决的问题将在会上享有优先权。2.［c］优先考虑的事: a top priority 应予以最优先考虑的事 Buying a new car was first on my list of priorities. 买一辆新车是我优先考虑的第一件事情。