形容词
中文翻译：Unknown
同义词：
['inaccessible', 'unattainable', 'insurmountable', 'impenetrable']
例句：
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1. The mountain peak was unreachable from the valley below.
从山谷下面无法到达山顶。
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2. The task seemed insurmountable at first, but with hard work, I managed to overcome it.
起初，这个任务似乎无法克服，但经过努力，我设法克服了它。
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3.The ocean is an inaccessible place for most humans, but for those who love it, it's a playground.
海洋对大多数人来说是不可达的地方，但对于那些热爱它的人来说，它是一片游乐场。