实验表明：神华煤液化残渣的燃烧是分两步进行的，在低温段主要是神华煤液化残渣中挥发性的气体急剧析出，引起燃烧失重；
Test result showed that combustion of Shenhua coal liquefaction residuals proceeds in two stages a low and a high temperature stage.
许多种子在发芽前需要一段时间来分层，并在低温下储存一段时间。
Many seeds require a period of stratification, exposure to low temperatures for some minimum period, before they will germinate.
鲜奶在保存了很长一段时间之后就很容易变质，特别是没有在低温下保存的时候。
Milk will go bad if it is kept for a long time, especially if it is not kept cold.
应用推荐