烟叶是一种吸湿性强的物料，在一定温湿度环境下烟叶保持一定的温度和含水率。
Tobacco leaves are high moisture material, and keep a certain moisture and temperature under certain environment and moisture.
中熟牛排(罕见)：牛排内部处处为血红色，保持一定的温度，同时在我的生活中练习部分。
A medium rare steak (rare) : steak internal everywhere for the inside of a blood red and keep a certain temperature, at the same time practice part in my life.
他们必须保持柴油有一定的温度，因为发动机要随时启动。
They keep the oil heated all the time because any minute they may need to start the engines.
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