... air alert 空袭警报 ground alert 地面待战 malfunction alert 故障报警 ...
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ground alert intercept 待命截击 ; 地面警戒拦截
ground alert status 地面待战状态
ground alert aircraft 地面值班飞机 ; 机场值班飞机
ground alert method 地面待战法
·2,447,543篇论文数据,部分数据来源于NoteExpress
It rolled and crashed vertically into the ground before the tower could alert the pilot, Plagens said.
CNN: One killed in California plane crash
According to Israel's army radio, army chief Lieutenant General Gaby Ashkenazi had ordered ground, air and naval forces to be on alert.
BBC: New security measures could remain in place for months
An effective warning system for such a natural disaster would quickly alert all residents in at-risk areas to move to higher ground.
FORBES: Earthquakes, Maybe. But Is Los Angeles Prepared For A Tsunami?
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