In Spain and Portugal there has been a decrease in the number of young people out of work.

西班牙和葡萄牙的失业青年人数已经有所下降。

Bank base rates have fallen from 10 per cent to 6 per cent – a decrease of 40 per cent.

银行的基准利率已从10降到了6—降幅达40。

Population growth is decreasing by 1.4 each year.

人口增长率正在以每年1.4的速度下降。

The number of independent firms decreased from 198 to 96.

独立公司的数量从198家减到了96家。

Since 1945 air forces have decreased in size.

1945年以来，空军的规模已经缩小。

Gradually decrease the amount of vitamin C you are taking.

逐渐减少你的维生素C摄入量。