diminution
n. 减少，降低；缩小
例句
They hope for a small diminution in taxes.
他们希望捐税能稍有减少。
《新英汉大辞典》
Age brought a gradual diminution of his strength and energy.
年龄使他的体力和精力逐渐减退。
The melting glaciers hide the diminution of the rains.
融化的冰川暗示着雨水的减少。
