unilateral contract

基本解释

There exist unilateral contract and bilateral contract in administrative contracts, but they are not the typical corresponding pair.
在行政契约中存在“ 和解契约”和“双务契约”的种类，但二者并非对应的类型。
They asked only signed between the monarch and his subjects unilateral "King contract" - I always have "faint" right, but you can only do "loyalty" obligation.
他们要求君臣之间只能签订单方面的“霸王合同”——我永远拥有“昏”的权利，但你们却只能尽“忠”的义务。
But the gift contract is a unilateral and gratuitous contract. So to protect the donator's benefit the Law should allow the donator to have the right of revocation in some special situation.
但因赠与合同系单务、无偿合同，所以为维护赠与人的利益，法律应于特殊情形下，允许赠与人撤销赠与。