Student numbers have decreased by 500.学生人数减少了500名。
Our sales are decreasing.我们的销售量在减少。
An electromagnetic wave of audio frequency produced by atmospheric disturbances such as lightning, having a characteristically decreasing frequency responsible for a whistling sound of descending pitch in detection equipment.啸声干扰一种由于诸如闪电等大气干扰而产生的音频电磁波，具有典型的逐渐减弱频率的特征，该频减引起了检波设备中调逐渐下降的啸声
Toy sales peaked just before Christmas and are now decreasing.玩具销售额在圣诞节前夕达到最高峰，现已逐渐下降。
Interest in the sport is decreasing.人们对此项运动的兴趣已逐渐淡薄。
