expand the arg

threads.tex

@@ -1081,7 +1081,7 @@
 \begin{itemize}
 \item waits for \texttt{pthread\_cond\_signal()} or
 \texttt{pthread\_cond\_broadcast()} or until the system time to reaches the
-\texttt{atime} value.
+absolute time given by the \texttt{atime} value.
 \end{itemize}
 \end{slide}