To cry out to heaven and knock one's head on the ground; to wail and lament excessively, expressing extreme grief or sorrow.
听到噩耗后，她悲痛欲绝，号天叩地，久久不能平静。
After hearing the tragic news, she was overcome with grief, crying out to heaven and knocking her head on the ground, unable to calm down for a long time.
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