gun emplacement drillinto-action gun drill火炮: artillery; cannon; gun放: release; set free; let go操练: drill放列: emplace; settingup操练: drill; practice 士兵们在兵营练兵场操练。 the soldiers were at drill in the barrack-yard.; 操练椅 plint下载手机词典可随时随地查词查翻译