declinev.下降;减少;变弱;拒绝;倾斜n.衰微;跌落;晚年
decline an invitation to dinner谢绝宴请
Declined to give further details拒绝提供进一步细节
decline to speculate one's motive钩口
decline rate differential equation递减率微分方程
Decline in Arable Land Utilization耕地利用下降