The airplane crashed about 5 miles southeast of Carrollton, and local hospitals were placed on alert.
The troops at the local base were put on full alert.
All our forces are on full alert.
英语词典包含67175条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。