又来打扰您了，嘿嘿……

In Australia--{where an aging population ,life--extending technology and changing community attitudes have all played their part}--other states are going to consider making a similar law to deal with euthanasia
原句可以简化为：
在澳大利亚，其他一些州也要制定类似涉及安乐死的相应法律。
In Australia，other states are going to consider making a similar law to deal with euthanasia

两个破折号之间的是定语，说明澳大利亚。
--{where an aging population ,life--extending technology and changing community
attitudes have all played their part}--

那里人口老龄化，长寿技术和社会态度变化等同时产生着影响。

全句翻译：
在那人口老龄化，长寿技术和社会态度变化等同时产生着影响的澳大利亚，其他一些州也要制定类似涉及安乐死的相应法律。