Consequently , most of the world ' s fridges are to be found , not in the tropics where they might prove useful , but in the wealthy countries with mild temperatures where they are climatically almost unnecessary 因此，世界上绝大多数冰箱不是出现在它们可能会证明自己会有用武之地的热带地方，而是在从气候上来说根本用不着它们的温和的热带国家。
2.
In this study , three typical high - resolution holocene soil profiles in the weihe valley were studied using particle - size analysis , measurement of magnetic susceptibility , total fe , toc , caco3 , rare earth elements and others . the results provide new insights into pedogenic environmental evolution and human impact of cultivation on soil development in this climatically sensitive semiarid zone 通过对各指标实验结果及其成壤环境意义的分析，探讨了全新世渭河流域成壤环境的演变以及土壤发育的特点；并借助历史文献和环境考古的成果，分析了人类活动与成壤环境之间的相互作用及其人地关系演变的过程。
