a. 可展开的, 可延长的, 可扩张的

[机] 可延伸的, 延伸性的

[ adj ]
capable of being protruded or stretched or opened out
<adj.all>
an extensile tonguean extensible measuring rule

Extensible \Ex*ten"si*ble\, a. [Cf. F. extensible. See
{Extend}.]
Capable of being extended, whether in length or breadth;
susceptible of enlargement; extensible; extendible; -- the
opposite of {contractible} or {compressible}. ``An extensible
membrane'' --Holder.