Mac OS X Updated Big Picture to make use of the Spaces feature for fullscreen mode On 10.9 and above ask the OS to prompt for Accessibility access to enable the overlay Fixed keyboard entry showing the wrong characters for composed languages Fixed ctrl key being stuck if you hit ctrl+arrow to change spaces
从字面意思理解: 1.美国正式的全称 The United States of America 2.拆分 :United联合的+States州(美国有50个州1个特区)+America美洲=美利坚合众国,美国是 联邦制 可以从国家名字看出来; 所以比较正式准确的用法是The United States of America(USA简),而Ameria或者US都是不正式的泛称或简称。