求翻译：不畏艰苦、不怕牺牲、意气风发、不断寻找新的土地、新的财富的牛仔精神、边疆精神，后来成为美国人一往无前、豪迈乐观、勇于开拓、探索不止的整个民族的精神。是什么意思？

Afraid of hard work, sacrifice, high-spirited, constantly looking for new land, new wealth of the cowboy spirit, the spirit of the frontier, the Americans became indomitable, heroic optimism, courage, and explore more than the entire national spirit.

fearless, not afraid to die hard, pride and constant search for new land, new wealth, frontier spirit of cowboy spirit, and later became an American an indomitable optimism, pride, dare to explore, explore more than the entire nation's spirit.

The fear difficult, does not fear no sacrifice, high-spirited, seeks the new land, the new wealth cowboy spirit, the border area spirit unceasingly, afterwards became the American unprecedented, heroic optimistic, dares the entire nationality's spirit which developed, the exploration continues.

Fearing no hardship, sacrifice, high-spirited, constantly looking for new lands and new wealth spirit of cowboys, frontier spirit, later became Americans indomitable, heroic optimism, dares to develop, explore more than the spirit of the nation as a whole.

正在翻译，请等待...