The change of the tropical pressure field is most similar with that of the time coefficients, and the time coefficients of different modes present obvious characteristics of periodical oscillation.

热带气压场随时间的变化与时间系数的变化相似性最大，不同模态的时间系数变化具有明显周期振荡现象。

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That is the upside of growing global demand for tropical food, timber and biofuels: pressure for Western standards to be adopted up the supply chain.

上述趋势反映了全球对热带食物、木材和生物燃料需求良性的一面，那就是向产业链施压，迫使其采用西方标准。

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A time-delayed correlation analysis between cold high pressure in winter and the number of tropical cyclones in summer for the period of 1989~1997 has been made.

本文对1989～1997年冬季冷高压气压场与夏秋热带气旋发生个数进行时滞相关分析，发现，两者间隔以后滞7个月为显著正相关。

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Mountain regions, particularly in tropical regions where they are prime human habitat, are increasingly threatened by climate change, demographic pressure, and economic development that in many cases lead to resource depletion and degradation, hindering the provision of critical goods and services to both mountain inhabitants and lowland communities.

UNESCO: OFFICE IN BRASILIA