In theory britain 's home secretary designates an area in which police may use stop-and-search powers for up to 28 days .
理论上说，英国内相指定一个区域，警察可以在此行使最长28天的盘查权。
An international agreement signed by britain and the us designates the titanic as an international memorial and seeks to protect it from being plundered or damaged by unauthorised dives .
一英美共同签署的国际协议标明泰坦尼克为国际遗产，并设法保护其不受未经授权的潜水人员掠夺或毁坏。
Mr. duncan 's will designates a handful of nonprofit groups and charitable foundations that will receive donations , all of which would have been tax-exempt even in years when the estate tax was in effect .
