unobtainable

adj.

难获得的；

1. Salt is very dear, and sometimes even unobtainable.
   盐很贵，有时买不到。
2. It would take a worldwide crisis to make food unobtainable from any source.
   只有发生全球性危机，才会到处买不到食品。
3. The absolute allocation of these overheads is unobtainable.
   这些企业管理费用的绝对分配是难以获得的。

Assay of thyroglobulin in serum with thyroglobulin autoantibodies: an unobtainable goal?
Increased risk of postoperative neurologic deficit for spinal surgery patients with unobtainable intraoperative evoked potential data.
An Andean Avatar: Post-Neoliberal and Neoliberal Strategies for Securing the Unobtainable
Multi-layer polyester/polyolefin shrink film
The measurement of diversity in different types of biological collections
Positron emission tomography study of human brain functional development
A macroscope in the redwoods
Gifts, Favors, and Banquets: The Art of Social Relationships in China
A language with distributed scope
The production of North Atlantic Deep Water: Sources, rates, and pathways