求翻译：温室效应是生命存在的一个必要条件，假若没有温室效应，地表的平均温度将是零下18℃。但是自18世纪下半叶工业革命完成以来，随着人类活动的不断增强，排入大气中的温室气体含量不断增加，温室效应被强化[2]，地球的平均温度大幅度的升高。是什么意思？

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The greenhouse effect is a life existence essential condition, if will not have the greenhouse effect, the surface average temperature will be below zero 18℃.But has completed since the 18th century next half Industrial Revolution, moves the unceasing enhancement along with the humanity, disperses i

The greenhouse effect is a necessary condition for life, without the greenhouse effect, lingxia18℃ is the average temperature of the Earth's surface. But since the second half of 18th century since the completion of the industrial revolution, with the increase of human activities, increased content

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