程序补充说明：对于时序逻辑

				#-- Synplicity, Inc.
				#-- Version Synplify Pro 8.1
				#-- Project file C:\prj\Example-4-1\cnt.prd
				#-- Written on Wed Mar 08 20:36:24 2006
				
				#
				### Watch Implementation type ###
				#
				watch_impl -all
				#
				### Watch Implementation properties ###
				#
				watch_prop -clear