Obama's Westside campaign office vandalized

 　　LOS ANGELES, Sept. 22 (Xinhua) -- U.S. President Barack Obama's Westside campaign office was vandalized Thursday night, Los Angeles police said.

　　Someone shot BB gun pellets and threw an object into the office located at 6700 block of South Centinela Avenue in Los Angeles. The incident happened just four days before Obama's scheduled visit to the city on Monday.

　　No staffers were in the office at the time of the shooting, the police said. But it was not disclosed whether the shooting was captured on surveillance video.

　　An investigation¹ involving several law enforcement agencies has been initiated².

　　The White House announced earlier that Obama is due to visit Los Angeles Monday to raise money for what is expected to be a bruising³ 2012 re-election campaign.

　　He was supposed to stay overnight in Los Angeles and depart on Tuesday morning.

　　The White House did not say whether the president will change his schedule.

1 investigation   

n.调查，调查研究

参考例句：

• In an investigation,a new fact became known, which told against him.在调查中新发现了一件对他不利的事实。
• He drew the conclusion by building on his own investigation.他根据自己的调查研究作出结论。

2 initiated   

n. 创始人 adj. 新加入的 vt. 开始，创始，启蒙，介绍加入

参考例句：

• He has not yet been thoroughly initiated into the mysteries of computers. 他对计算机的奥秘尚未入门。
• The artist initiated the girl into the art world in France. 这个艺术家介绍这个女孩加入巴黎艺术界。

3 bruising   

adj.殊死的；十分激烈的v.擦伤(bruise的现在分词形式)

参考例句：

• He suffered cracked ribs and bruising. 他断了肋骨还有挫伤。
• He slipped and fell, badly bruising an elbow. 他滑倒了，一只胳膊肘严重擦伤。 来自辞典例句