[basic.stc.dynamic] Fix definition/explanation of dynamic storage dur…

…ation

source/basic.tex

@@ -3989,15 +3989,18 @@
 \rSec3[basic.stc.dynamic]{Dynamic storage duration}%
 
 \rSec4[basic.stc.dynamic.general]{General}%
-\indextext{storage duration!dynamic|(}
 
 \pnum
-Objects can be created dynamically during program
-execution\iref{intro.execution}, using
+Objects created using
 \indextext{\idxcode{new}}%
-\grammarterm{new-expression}{s}\iref{expr.new}, and destroyed using
+\grammarterm{new-expression}{s}\iref{expr.new}
+and implicitly created objects\iref{intro.object}
+have \defnadj{dynamic}{storage duration}.
+Objects created using \grammarterm{new-expression}{s}
+may be destroyed using
 \indextext{\idxcode{delete}}%
-\grammarterm{delete-expression}{s}\iref{expr.delete}. A \Cpp{} implementation
+\grammarterm{delete-expression}{s}.
+A \Cpp{} implementation
 provides access to, and management of, dynamic storage via
 the global \defnx{allocation functions}{allocation function}
 \tcode{\keyword{operator} \keyword{new}} and