杰克：你也可以写一下他的性格特点、业余爱好以及跟同学之间的关系等情况。
Jack: You can also state his personality traits, hobbies and relationships with schoolmates and so on.
分析了钢铁企业余热蒸汽回收利用系统的特点，研究表明，做好余热蒸汽的回收和科学利用可以使钢铁企业对一次能源的需求量减少约8％。
The waste-heat stream system is researched and it is shown that about 8% of the primary energy would be saved with the reasonable waste-heat stream recoveries and utilizations.
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