The entrance to Google headquarters is seen in Moutain View, Calif., Tuesday, April 6, 2004. Google Inc. hails its free e-mail service as a welcome breakthrough in online communication, but consumer watchdogs are attacking it as a creepy invasion of privacy that threatens to set a troubling precedent. Although Google's 'Gmail' service isn't even available yet, critics already are pressuring the popular search engine maker to drop its plans to scan e-mail content electronically so it can distribute relevant ads alongside incoming messages. (AP Photo/Paul Sakuma)

词汇：

headquarters n.总部

hail vt.使象下雹样落下，猛发

breakthrough n.突破

watchdog n.看门狗，监察人（员），监督人（员）

creepy adj.爬行的，匍匐的，鬼鬼祟祟的

invasion n.入侵

precedent n.先例

distribute vt.分发，分类

relevant adj.有关的，相应的

alongside adv.在旁