decline的名词？？？

本身有名词

decline的中文翻译
以下结果由译典通提供词典解释
不及物动词 vi.

1.下降,下跌;减少;衰退,衰落
As one grows older one's memory declines.
人的记忆力随着年龄增长而衰退。
Unemployment declined to 4 percent last month.
上个月失业率降至百分之四。
2.【书】倾斜;下垂
3.婉拒;谢绝

及物动词 vt.

1.婉拒;谢绝[+to-v]
She declined their invitation.
她婉拒了他们的邀请。
She declined to have lunch with her friend, saying that she wasn't feeling well.
她说她身体不舒服,婉拒了与她的朋友共进午餐。
2.【语】使发生词尾变化,使变格

名词 n.

1.下降;减少[S1]
There is a decline in real wages.
实际工资有所减少。
2.衰退,衰落[the S]
3.最后部分;晚年[the S]
4.倾斜[the S]

decline本来就有名词的意思
下降，减少，衰退
例如 there has been a sharp decline in profits this year.
今年利润大幅下降

decline的名词和动词一样。

还是decline