To describe the arduous and dangerous conditions of traveling on steep, rugged mountain roads; to indicate extremely difficult and perilous mountain travel.
当年开拓者们为了修建这条公路，不得不束马悬车，历经千辛万苦。
To build this road, the early explorers had to bind their horses' hooves and hoist their carriages, enduring countless hardships.
Era:
Ancient
Frequency:
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