a decline

He fell into a decline.

他的影响逐渐减弱.

The new system may be more economic but will lead to a decline in programme quality.

新系统可能更合算，但是会降低程序质量。

There has been a decline in enrollment in liberal arts courses in favor of highly specialized training for high-paying careers, mostly in business.

文科课程的报名人数有所下降，而以商业为主、针对高薪职业的高度专业化培训课程则越来越受欢迎。