declinev.下降；减少；变弱；拒绝；倾斜n.衰微；跌落；晚年declined urban area城市衰落区decline with thanksvi.婉言谢绝decline to disclose拒绝透露Decline Safety Fault倾斜安全失效decline in the value贬值decline in judgement判断力下降decline in population人口减少decline in production生产衰退decline reunification拒统decline of production[经] 产量下降