16.Thereisagrowingworldwideawarenessoftheneedforstrengthenedenvironmentalprotection.
17.TherehasbeenadramaticincreaseinthespreadofHIV/AIDSinrecentyears,withanewstudyprojectingthatthedreadeddiseasewillaffectover30millionpeopleworldwidebytheyear2005.
近年来,艾滋病蔓延的幅度进一步扩大,一项新的研究预测,到2005年,世界上有超过三千万人将感染这一可怕的疾病。
18.Workingwiththedisabledcannothelpbutleaveoneimpressedwiththeirindefatigabledesire.
与残疾人一起工作使一个人不得不对他们坚持不懈的渴望印象深刻。
19.Perhapsnoissuesaremorecontroversialthaneuthanasiaandabortion,bothofwhichinvolvetakingthelifeofahumanbeing.
也许没有问题比安乐死和人工流产更有争议性,它们都涉及结束一个人的生命。
20.Neverbeforeinhistoryhastheissueofoverpopulationbeenmoreevidentthannow.