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What is the rain forest?

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What is the rain forest?
要英文和解释.
What is the rain forest?
什么是热带雨林 (tropical rain forest)? 一般认为热带雨林是指耐阴、喜雨、喜高温、结构层次不明显、层外植物丰富的乔木植物群落.
热带雨林主要分布于赤道南北纬 5 ~ 10度以内的热带气候地区.这里全年高温多雨,无明显的季节区别,年平均温度 25 ~ 30 ℃,最冷月的平均温度也在 18 ℃ 以上,极端最高温度多数在 36 ℃ 以下.年降水量通常超过 2 000mm ,有的竟达 6 000mm ,全年雨量分配均匀,常年湿润,空气相对湿度 90 %以上.
What is a tropical rain forest (tropical rain forest)? Generally refers to the tropical rain forest shade-tolerant, Rain, high-temperature-hi, no structural level, the layer of rich plant trees outside the plant.
Tropical rain forests are mainly located in the equatorial north-south 5 to 10 degrees latitude within the tropical climate of the region. High temperature and rainy the whole year here, no significant difference between the seasons, the average annual temperature of 25 ~ 30 ℃, the coldest month, the average temperature is above 18 ℃, extreme maximum temperature below 36 ℃ in the majority. Annual rainfall usually last more than 2 000mm, some as high as 6 000mm, uniform distribution of rainfall throughout the year, humid all year round, air relative humidity 90%.