相关单词近义词 vigilant 警戒的, watchful 注意的, alert 警觉的, on the ball 有准备bright-eyed and bushy-tailed, 警觉地准备做某事..., perky 活泼的, unsleeping 未入睡的, heads-up 足智多谋的临近词wide, wide jaw 返回 wide-awake