有时，他们被迫绕过伊朗边防军的混凝土机枪阵地，有时，他们不得不趟过寒冷的山涧溪流或绕过峻峭的悬崖。
Sometimes they are forced to skirt the concrete machine gun emplacements of Iranian border guards, at others they have to wade across freezing mountain streams or negotiate sheer precipices.
有时，他们被迫绕过伊朗边防军的混凝土机枪阵地，有时，他们不得不趟过寒冷的山涧溪流或绕过峻峭的悬崖。
Sometimes they are forced to skirt the concrete machine gun emplacements of Iranian border guards, at others they have to wade across freezing mountain streams or negotiate sheer precipices.
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