n. 1.减少，减小，减退。 2.减少额，减小量。 短语和例子 a decrease in production 生产减少。 Cases of this nature are on the decrease. 这类案件正在减少。 vt.,vi. 减，减少，减退；(温度表等)下降。 decrease the number to ... 把数目减少到…。 decrease in size 尺寸减小。
the act of decreasing or reducing something 同义词：diminution, reduction, step-down,
the amount by which something decreases 同义词：decrement,
a change downward; "there was a decrease in his temperature as the fever subsided"; "there was a sharp drop-off in sales" 同义词：lessening, drop-off,
a process of becoming smaller or shorter 同义词：decrement,
decrease in size, extent, or range; "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper" 同义词：diminish, lessen, fall,
make smaller; "He decreased his staff" 同义词：lessen, minify,
例句与用法
1.
Solar irradiance decreases towards the poles . 太阳辐照率向两极递减。
2.
There has been a decrease in traffic accidents . 交通事故减少了。
3.
There is a general decrease in grain size upward . 粒度一般是向上递减的。
4.
Temperature ordinarily decreases with height . 温度一般随高程增加而降低。
5.
Cases of this nature are on the decrease . 这类案件正在减少。
6.
His interest in this subject gradually decreases . 他对这门学科的兴趣逐渐减退。
7.
The demand for tea is on the decrease ( each year ) . 茶叶的需求量（逐年）递减。
8.
The drag force decreases as the air density decreases . 当空气密度减小时阻力也减小。
9.
The aftershock frequency decreases regularly with time . 余震的频度随时间有规律地减少。
10.
The population of the soviets had decreased by about 600, 000 . 苏区人口减少了六十万人。
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