C hi <chr_var letter="E" var="2">E2</chr_var>nmamgui<chr_var letter="s" var="long">∫</chr_var> .<chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> ci <unclear reason="illegible">y-dot</unclear>ua<chr_abbr type="reg" class="dc" expan="in" cert="no">i-hbar</chr_abbr><chr_var letter="s" var="long">∫</chr_var>. 