Other polymers, e. g. urea-formaldehyde and polyurethanes, are important insulating materials for reducing heat losses and hence reducing energy usage.
另一些高聚物，比如，脲甲醛和聚脲，是非常重要的绝缘材料可以减少热量损失因而减少能量损耗。
Hence, it is absolute and thus one-sided to conclude that there is only one method, i. e. dialectics, in Capital, while all others are its direct application and embodiment.
因此，说《资本论》中只有一种方法，就是辩证法，其它一切都是辩证法的直接运用或表现，这样的说法是绝对化的因而是片面的。
Hence it can be divided into four categories, i. e. mobilizing resources, public service, social coordination and policy-advocating.
由此，也可以将其分为动员资源型、公益服务型、社会协调型、政策倡导型等四种类别。
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