To describe extremely rugged, precipitous, and perilous terrain, making passage exceedingly difficult; figuratively, to describe a situation fraught with severe obstacles.
这条通往山顶的小径，处处悬兵束马，徒步攀登需要极大的勇气和体力。
The path leading to the mountaintop was extremely rugged and perilous, and hiking it required immense courage and physical strength.
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