Three people injured in U.S. high school shooting

    LOS ANGELES, Jan. 18 (Xinhua) -- Three people were wounded（受伤） by gunshots on Tuesday morning at Gardena Senior High School in the Los Angeles area, as the police were searching for a student who may have brought a gun to the campus¹.
    The shooting was reported at 10:30 a.m. at the campus at 1301 W. 182nd St., according to the Los Angeles Fire Department. The extent² of the injuries or whether any officers were hurt were not immediately known.
    The officers were searching for a suspect who may be a 16-year-old student.（本文由在线英语听力室整理编辑）

1 campus   

n.大学校园，学校校园；大学　

参考例句：

• They spoke of the old days on the campus.他们谈起昔日的校园生活。
• The campus covers an area of twenty square kilometres.这个校园占地二十平方公里。

2 extent   

n.程度，范围，限度；广度，宽度，大小

参考例句：

• The new race track is nearly six miles in extent. 这条新跑道将近六英里长。
• What's the extent of the damage? 损坏的程度如何?