impractical
adj. 不明智的，不切实际的；（人）无动手能力的，手不灵巧的
例句
It was totally impractical to think that we could finish the job in two months.
认为我们能在两个月之内完成这项工作，这完全是不切实际的。
《牛津词典》
Once there were regularly scheduled airlines, it became impractical to make a business trip by ocean liner.
一旦有了定期的飞机航班，乘坐远洋客轮出差就变得不切实际了。
《柯林斯英汉双解大词典》
They prove impractical for city councils.
事实证明，它们对市议会来说是不切实际的。
