To reduce the risk of rainforest die-back, the World Bank recommends reforesting 40m hectares of Amazonian land that had been illegally cleared.
为防止雨林枯萎的带来的危险，世界银行建议在亚马逊遭到非法砍伐的地区重造4000万公顷的森林。
Conversely, when forests are cleared or die back because of global warming, they emit carbon.
相反，森林因为全球变暖遭到毁灭或者枯萎时，就会释放碳。
They often take a long time to die back after flowering.
花期过后，它们的枝叶常常过很长一段时间才会枯萎。
They often take a long time to die back after flowering.
花期过后，它们的枝叶常常过很长一段时间才会枯萎。
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