ϵͳУ1sub-modelʱmain modelеģ͹stocks, flows, converters, connectors, Sub-model icons, Sector Frames, Decision Process Diamonds, Pad icons, Numeric Displays, Text Boxes,˵Ͷ2ӵ㡣1ӵǵsub-modelرʱڵӵ㣻2ӵǵsub-modelʱڵӵ㡣

2ӵʵǱʾsub-modelرʱsub-modelģеģ͹ֱmain modelеһģ͹ӡ

磬򿪡3 sub-modelmain modelģ͹ĶӦϵ_¹Ⱥģ.stmsub-modelرʱmain modelеbirthsdeaths϶deer populationӣsub-modelͻ֣ᷢmain modelеbirthsʵָС¹yearlingbirths'Һmature deerģmain modelеdeathsʵϾ͵sub-modelеdeaths'mature deerdeaths''yearlings֮͡

4 ģ͵ʱζģͣģͺģͣ_йRolling upRolling down.txt