1.…experience a steady decline in…经历稳步下降

【例】China experienced a steady decline in agriculture and manual work.

中国在农业和手工业方面呈现稳步下降。

      2....decrease from...to... 从…降至…

【例】The number of male smokers decreased from 21% in 1960 to 17% in 2000.

男性烟民的比值从 1960 年的 21% 降至 2000 年的 17%。

      3....be in decline …出现下降趋势

【例】The consumption of hamburgers and pizza has been in decline over that same period.

      在同一时期，汉堡包和披萨的消费量出现下降趋势。

      详情可咨询新航道石家庄学校。