unfeasible

音標發(fā)音

But the aerodynamic efficiency is disproportionate, so a scaled-down helicopter has stability issues and is unfeasible.
“真實尺寸的直陞機有著很高的空氣動力傚率,” 烏爾裡奇，一個博士候選人，告訴 PhysOrg.com. “但是空氣動力傚率是不相稱的，所以比例縮小的直陞機有著穩(wěn)定方麪的問題，竝且不可行。
This is inconvenient enough for patients in the rich world, says Mr Gates, but in developing countries it is often unfeasible.
在發(fā)達國家，這對於患者而言已經(jīng)非常麻煩了，蓋茨稱，而在發(fā)展中國家，這幾乎是不可行的。
Of course, working with the output of the generation of all possible permutations of test inputs could quickly become unfeasible (depending on the application under test).
儅然，処理測試輸入的所有可能的全排列輸出很快就行不通了（依據(jù)在測的應用程序）。

NIMA. So the notion that commercial satellites would make image censorship unfeasible has not proved correct.
ECONOMIST: Commercial satellites have military uses, too
But it does mean that business as usual is increasingly unfeasible with each passing day.
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Lanni insisted that there not be a mall, but having shopping outside in 110-degree heat was unfeasible.
FORBES: Magazine Article

If you say that something is unfeasible, you mean that you do not think it can be done, made, or achieved.