简介：Manywomentodayhavethefreedomtodecidewhentheywillhavechildren,iftheywantthem.Untilaboutfiftyyearsago,womenspentmostoftheiradultliveshavingchildren,yearafteryear.ThischangedbecauseofeffortsbyactivistslikeMargaretSanger.Shebelievedthatasafeandsuremethodofpreventingpregnancywasanecessaryconditionforwomen'sfreedom.Shealsobelievedbirthcontrolwasnecessaryforhumanprogress.

简介：Sinceancienttimes,asoneofthesymbolsofuglyanddirty,prostitutesareinvariablylivingintheblackmarginsofsociety.Facingprostitutes’miseries,peoplealwayscannotunderstandtheiremotions,mentalitiesanddesires,ortreatsthemasequals,particularlyaswomen.ProstitutesareaspecialgroupintheoppressedwomeninWesternsocieties.MargaretandNanaaretwotypicalimagesoftheminthehistoryofwesternliterature.Withtearsandlives,theydeducetheirmiserablelifestoriessimilarly.

简介：个人通信是电信业中快速增长和日益重要的领域，也是下代的移动通信。实现任何人在任何地点和任何时间与其他任何人进行通信，这是一个非常理想的境界，个人通信特使这一梦想成为现实。