1·The biggest is Mr Obama’s decision not to take on the gun lobby by seeking to renew a ban on the sale of certain semi-automatic weapons which lapsed in 2004.
最大的问题就是奥巴马决定不支持赞成拥有枪支的游说团体，而试图重新促使在2004年失效的禁止出售某种半自动武器的禁令再次生效。
2·The "lapsed listener" problem can be caused by carelessness at the design level: not adequately considering the lifetimes of the objects involved or simply by sloppy coding.
“失效侦听器”的问题可以由设计级别上的不小心造成：没有恰当地考虑包含的对象的寿命，或者由于松懈的编码。
3·Mexico would be even better served if the United States renewed a ban on the sale of assault weapons that lapsed in 2004.
假如美国重新恢复2004年失效的突击武器禁售令，也许都会给墨西哥带来更大的协助。
4·One approach that is sometimes suggested for dealing with lapsed listeners is to use weak references.
有时推荐的一个处理失效侦听器的方法是使用弱引用。
5·Another technique that can sometimes be used to find otherwise hidden lapsed listeners is preventing a given listener object from being registered twice with a given event source.
另外一项可以用来找到隐藏失效侦听器的技术是：防止指定侦听器对象在指定事件源上登记两次。