In 2003 and 2004, tobacco ripened slowly, followed by a rapid decline in quality due to excessive rainfall.

在2003 ~ 2004年，烟叶成熟很慢，但由于过多的降雨，烟叶质量很快下降。

Land DEGRADATION - means "the decline in quality of natural land resources, commonly caused through improper use of the land by humans."

土地退化，是指自然土地资源质量的退化，通常是由人类不合理的土地利用所导致。

It has experienced an overall decline in air quality.

空气质量整体下降了。

Schoolteachers are protesting, too, against a rapid decline in the quality of primary and secondary education.

ECONOMIST: Sri Lanka��s universities

"We are facing a serious decline in the quality of graduates looking to enter the industry, " said David Braben.

BBC: Skills shortage hits games firms

So there is a powerful incentive to sell higher-grade but lower-yielding loans, with a subsequent decline in the quality of banks' balance sheets.

ECONOMIST: ��Structured finance�� can bring unstructured losses