We guarantee the fastness of these dyes. 我们担保这些染料不褪色.
We guarantee the fastness of these dyes. 我们担保这些颜料不褪色。
The rebels have withdrawn to their mountain fastness for the winter. 叛军撤至他们的山寨过冬。
fastness
[ noun ]
a rate (usually rapid) at which something happens
<noun.attribute> the project advanced with gratifying speed
the quality of being fixed in place as by some firm attachment
<noun.attribute>
a strongly fortified defensive structure
<noun.artifact>
Fastness \Fast"ness\, n. [AS. f[ae]stnes, fr. f[ae]st fast. See {Fast}, a.] 1. The state of being fast and firm; firmness; fixedness; security; faithfulness.
All . . . places of fastness [are] laid open. --Sir J. Davies.
2. A fast place; a stronghold; a fortress or fort; a secure retreat; a castle; as, the enemy retired to their fastnesses in the mountains.