artillery designed to shoot upward at airplanes
同义词：antiaircraft??/??antiaircraft gun??/??flak??/??flack??/??pom-pom??/??ack-ack gun
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。