短语词组短語silo -bottom launch [軍]井底發射silo launch facility 井下發射設施silo launch test facilities 井下發射試騐設備in -silo launch capability 發射井中發射能力out -of-silo launch 井下發射launch silo 地下發射井missile launch silo 導彈發射井 返回 silo launch