1·Thankfully the smoking of cigarettes is on the decline.
感谢的是吸烟正在减少。
—— 《柯林斯英汉双解大词典》
2·These days, as studies in the U.S.show bullying on the rise and parental supervision on the decline, researchers who study bullying say that calling moms and dads is more futile than ever.
如今，随着美国的研究显示欺凌行为在上升，而父母的监督在下降，研究欺凌行为的研究人员说，给父母打电话比以往任何时候都更没用。
3·Things have been on the decline for some years.
几年来，这种情况发生的几率一直在下降。
4·Unfortunately, activities involving direct contact with people, which contributed to better wellbeing, were found to be on the decline.
不幸的是，人们发现，有助于提高幸福感的与人直接接触的活动减少了。
5·His prosperity is on the decline.
他的好光景日见衰败。
—— 《新英汉大辞典》
6·Is your industry on the decline?
你所在行业是否正在下滑？
7·The birthrate is on the decline.
出生率在下降。
8·The population is on the decline.
人口正在减少。
9·Drug stocks and telecoms were also on the decline.
医药板块和电信板块也普遍下跌。
10·The forces of imperialism are on the decline.
帝国主义的力量正在逐渐衰退。