在古代历史的长河中，有许多忠贞不屈的故事流传至今，其中最为人称道的便是苏武牧羊的故事。这一故事不仅体现了中华民族坚韧不拔的精神，也展现了忠诚与信念的力量。以下是《苏武牧羊》的原文及其翻译。

原文：

苏武者，汉朝之使节也。奉命出使匈奴，不幸被俘。匈奴单于欲降其志，屡次劝降未果。单于遂将其流放至北海（今贝加尔湖）牧羊，并言：“俟羝乳乃得归。”羝者，公羊也。公羊岂能乳？此为绝境矣。

然苏武持节不屈，每日牧羊，心怀故国。虽身处荒凉之地，食不果腹，衣不蔽体，仍不忘汉室尊严。数载之后，汉匈和亲，苏武终得归汉。其节操之坚，令世人敬仰。

翻译：

Su Wu was an envoy of the Han Dynasty. On a mission to the Xiongnu, he was captured. The Chanyu (leader) of the Xiongnu attempted to make him surrender, but Su Wu refused despite repeated persuasion. In response, the Chanyu exiled him to herd sheep by the Beihai (today's Lake Baikal), saying: "Only when the male sheep gives milk can you return." Male sheep cannot give milk; this was a desperate situation indeed.

However, Su Wu held firm to his beliefs and never bowed to the enemy. While herding sheep in the desolate land, enduring hunger and cold, he never forgot his homeland. Years later, when peace was made between the Han and the Xiongnu through marriage alliances, Su Wu finally returned to the Han court. His unwavering integrity has been admired by people ever since.

这段故事不仅仅是一个人的坚持，更是一种精神的象征，激励着后世无数人为正义与真理奋斗不懈。