The quality of a photographic reproduction decreases with time.

照片的洗印质量会随着时间的推移而下降。

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Apramycin's inhibitive effect on fungus is related to its concentration in the soil and decreases with time in soil.

安普霉素对不同土壤中对真菌的抑制作用，随药物质量分数的降低和作用时间的延长而降低。

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The temperature of oils stored in a tank decreases with time, with temperature drop being a function of time and heat conduction.

在储存油品的容器内，油品的温度随储存时间的增加而逐渐降低，因而油品的这种温降与时间、传热等有一定的关系。

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Dr Lawrence Whalley of the University of Aberdeen, who has led research showing that smokers' cognitive ability decreases with time, said the current study findings were very important.

BBC: NEWS | Health | Tobacco smoke dulls child brains

In addition, vitamin D can be produced by the skin with sunlight exposure, but this ability decreases with age and varies considerably by geography, time of day or year, skin melanin content (darker skin produces less vitamin D) and sunscreen use.

CNN: How much vitamin D should someone over 55 take?