In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

It is used as a reinforcing material for many polymer products .
Glass fibers are therefore used as a reinforcing agent for many polymer products ; to form a very strong and relatively lightweight fiber-reinforced polymer ( FRP ) composite material called glass-reinforced plastic ( GRP ) , also popularly known as " fiberglass " .

A receptor antagonist is a biological repressor molecule .
A receptor antagonist is a type of receptor ligand or drug that blocks or dampens a biological response by binding to and blocking a receptor rather than activating it like an agonist .

In Canada , National Historic Sites are places that the government has decided are important in Canada 's history .

National Historic Sites of Canada are places that have been designated by the federal Minister of the Environment on the advice of the Historic Sites and Monuments Board of Canada ( HSMBC ) , as being of national historic significance .

