1.You can include extension elements and attributes throughout an Atom document with a few basic exceptions.
除了几个例外，可以在Atom文档中任何地方使用扩展元素和属性。
2.President Obama insisted that any tax cuts extension must also include extension of unemployment benefits,
与此同时，美国总统奥巴马坚持表示，减税政策的延长一定要包括失业福利的延长。