1. The local people fenced the land to
preempt it against other claimants.
当地人把地围了起来,以获得排斥他人购买该地的优先购买权。
3. The taxpayer has the rights of free use,
preempt use, equality use and priority of important benefits relative to other taxpayers.
纳税人相互之间对免费公共产品享有免费使用权、先占使用权、平等使用权和重大利益优先权。