His eyesight had been slowly deteriorating.

他的视力正在慢慢衰退。

youdao

Everything around me is slowly deteriorating.

我身边的一切都在慢慢的恶化。

youdao

The farmers' income in China has been increasing very slowly and deteriorating significantly relative to urban population in recent years. This actuality has also drawn great attention.

近年来我国农民收入增长缓慢，相对收入日益恶化的现状已经引起了各方注意。

youdao

Community councillor Sheila Campbell said the boxes had been deteriorating slowly and the scheme had restored them to their former glory, as well as allowing them to take on a useful new lease of life.

BBC: Scottish Borders village phone boxes get new 'hub' role