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.

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 the center is a quartered shield , with each quarter containing a major crop of Pakistan at the time of its adoption : cotton , jute , tea , and wheat .
The quartered shield in the centre shows cotton , wheat , tea and jute , which were the major crops of Pakistan at independence and are shown in a form of shield and signify as the main agricultural base for the importance of the Nation 's economy .

The word " tabor " is simply an English variant of a Latin word meaning " drum " It has been used in the military as a marching instrument .
The word " tabor " is simply an English variant of a Latin-derived word meaning " drum " cf . , It has been used in the military as a marching instrument , and has been used as accompaniment in parades and processions .