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Sadly, it's much easier to create a desert than a forest. - James Lovelock A cactus doesn't live in the desert because it likes the desert; it lives there because the desert hasn't killed it yet. - Hope Jahren?
轻松定制 数据图表（可通过Excel编辑） 无需图形设计技能即可轻松自定义 精心制作的幻灯片 所有元素都是可编辑的
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