请求分析下列句子的语法,并翻译一下,详细点的,谢谢
1.many people are used to changing their cell phones for new ones once there are new models launchedin the market even though their old phones can still be used.
2.it is a waste of money to do so because it is not necessary to buy a new model which has only new functions you will never use.
3.the news was that Russia had solved the hostage crisis.
the news that Russia had solved the hostage crisis.分析下两句子的区别