decrease

• Solar irradiance decreases towards the poles .
  太阳辐照率向两极递减。
• There has been a decrease in traffic accidents .
  交通事故减少了。
• There is a general decrease in grain size upward .
  粒度一般是向上递减的。
• Temperature ordinarily decreases with height .
  温度一般随高程增加而降低。
• Cases of this nature are on the decrease .
  这类案件正在减少。
• His interest in this subject gradually decreases .
  他对这门学科的兴趣逐渐减退。
• The demand for tea is on the decrease ( each year ) .
  茶叶的需求量（逐年）递减。
• The drag force decreases as the air density decreases .
  当空气密度减小时阻力也减小。
• The aftershock frequency decreases regularly with time .
  余震的频度随时间有规律地减少。
• The population of the soviets had decreased by about 600, 000 .
  苏区人口减少了六十万人。