vt. 冻干

[ verb ]
preserve by rapid freezing and subsequently drying in a vacuum
<verb.change>
freeze-dry the strawberries

Freeze-dry \Freeze"-dry`\ (fr[=e]z"-dr[imac]`), v. t. [imp. & p.
p. {Freeze-dried}; p. pr. & vb. n. {Freeze-drying}.]
to remove the moisture from (e.g. food) by first freezing and
then subjecting to a high vacuum; -- used as a mild method
for drying foods or chemicals while causing little
decomposition, in contrast to heat-drying.

Note: This is a relatively gently drying process used to
preserve food or sensitive biological materials. For
biochemical materials, the term {{lyophilize}} is often
used.
[PJC]