正如大多数其他模式一样，观察者模式的作用远远超过了其最初的想法。-icensee may receive a full refund if within thirty (30) days

from the date of delivery (the "Acceptance Period") Licensee

does not accept the terms and conditions of this License and the

applicable Addendum, or if Licensee terminates this License for

any reason, within