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1·When cultivated and stripped of their dense vegetative cover, soils of the humid tropics quickly lose their fertility.

当将厚密的植被除去并耕种时，潮湿热带地区的土壤就会迅速失去其肥力。

2·The fewest signals of selection were seen among people who live in the humid tropics, the ecoregion where the ancestral human population evolved.

最少观察到遭到自然选择的是生活在潮湿热带气候地区的人们，这些地区是人类祖先的栖息地。

3·Natural exposing tests in humid tropics atmosphere environment and accelerated ageing tests for 210 coat test samples of domestic automotives are carried out.

对国产汽车所用210种涂层试样进行了湿热带大气环境自然曝晒试验及人工加速老化试验。

4·Pushed out of northern temperate zones by DDT spraying and the draining of wetlands half a century ago, malaria remains entrenched in the humid tropics of Asia.

虽然在半个世纪前，在北方的温带地区通过喷洒ddt和排干沼泽的办法已经消灭了疟疾，但其在亚洲潮湿的热带地区却仍根深蒂固。