adj.不可行的，难以实现的

The proposal of launching a man to Mars within a year is unfeasible given our current technological limitations.
这个在一年内将人送上火星的提议鉴于我们当前的技术限制是不可行的。
The company's plan to build a new factory in the Arctic Circle is unfeasible due to harsh environmental conditions.
公司在北极圈建立新工厂的计划由于恶劣的环境条件而变得不可能实现。
Designing a car that can travel at supersonic speeds without a sonic boom is an unfeasible dream.
设计一辆能在不产生音爆的情况下达到超音速行驶的汽车是一个不切实际的梦想。
The government's commitment to providing free college education for all is currently unfeasible due to budget constraints.
政府承诺为所有人提供免费大学教育，目前因预算限制而无法实现。
The ancient city's restoration project requires vast resources and expertise, making it an unattainable goal.
古城的修复工程需要大量的资源和专业知识，使其成为遥不可及的目标。
The government's plan to eradicate poverty within a decade is unworkable without significant economic reforms.
在没有重大经济改革的情况下，政府要在十年内消除贫困的计划是无法实施的。
The idea of building a bridge connecting two continents using only natural materials is unfeasible.
仅用天然材料连接两大洲的想法是不现实的。
The small startup's ambitious goal of launching a satellite into space without any external funding is unattainable.
小型初创公司想在没有任何外部资金支持的情况下发射卫星，这是不可能实现的。
The proposed renewable energy solution for remote areas with no grid connection is impractical due to high initial costs.
对于无电网连接的偏远地区提出的可再生能源解决方案，由于初始成本高，是不切实际的。
The concept of time travel to the past is unfeasible based on our current understanding of physics.
根据我们当前对物理学的理解，回到过去的时间旅行概念是不可行的。