<chr_var letter="S" var="1">S1</chr_var> entr<chr_abbr type="reg" class="dc" expan="en" cert="no">e-hbar</chr_abbr> contr<chr_abbr type="reg" class="dc" expan="en" cert="no">e-hbar</chr_abbr>t .<chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> <chr_var letter="s" var="long">∫</chr_var>entre fierent. 