There are times when you should request copies of your records: 1  Permanent Change of Station. 2  Deploying. 3  Retiring.
0. EXPERT ANSWER. Double coincidence of wants refers to a situation in a barter system where the goods or services offered by a seller are exactly the same as that required by a buyer and vice versa.
double whammy noun [C usually singular]. âº a âsituation when two âunpleasant things âhappen at âalmost the same âtime: Farmers have âfaced the âdouble âwhammy of a ârising âdollar and âfalling âagricultural âprices.