decrease by中文什么意思

减少了

• decrease:    n. 1.减少，减小，减退。 2.减 ...
• decrease to:    减少到
• on the decrease:    在减少中

例句与用法

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1. The population of the soviets had decreased by about 600, 000 .
   苏区人口减少了六十万人。
2. The counter output, which represents a binary number, decreases by 1 any time the counter is triggered by a pulse .
   每当计数器被时钟脉冲触发一次时，计数器输出的二进制数便累减1。
3. Merchandise increased by ( decreased by ) 300 pieces
   商品增加了（减少了） 300个。
4. Semen quality decreased by inorganic arsenic
   饮水中无机砷对男性精液质量的影响
5. For example , the count of a semaphore is decreased by one
   例如，信号量计数减少1 。