[see also: characteristic, detail, element, ingredient
1
One unusual feature of the solution should be pointed out.
The remarkable feature of this theorem is that......
The only additional feature is the appearance of a factor of 2.
This t has the feature we want.
Iterated correspondences display many of the features of......
a basic <distinctive/essential/key/main/major/significant/dominant/special> feature
2
We now describe a more interesting example featuring an operator
that is non-trivially supercyclic.