如果狗颈部的毛都竖立起来，或是它发出低分贝咆哮，或是呈掠夺、跟踪姿势，那么周围肯定存在危险。
If the dog's hackles are up, gives a low decibel growl, or engages in a predatory, stalking posture, then there is probably a danger in the environment.
烈士纪念碑被竖立起来。
乌鸦看见狐狸吓得把黑羽毛竖立起来。
The crow ruffled its black feathers at the sight of the fox.
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