n. 不能变换, 不能兑换

[经] 不兑换, 不可兑换

[ noun ]
the quality of not being exchangeable
<noun.attribute>
the inconvertibility of their currency made international trade impossible

Inconvertibility \In`con*vert`i*bil"i*ty\, n. [L.
inconvertibilitas.]
The quality or state of being inconvertible; not capable of
being exchanged for, or converted into, something else; as,
the inconvertibility of an irredeemable currency, or of lead,
into gold.