Las vegas ' s explosive growth has been slowed by the desert tortoise and the discovery of two rare plants 拉斯维加斯原本突飞猛进的发展被沙漠龟和两种罕见的植物减缓下来。
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The pine tree project has completed extensive environmental impact studies to monitor and protect threatened and endangered species including the desert tortoise and the mojave ground squirrel 松树项目已经完成了广泛的环境影响研究，以监测和保护可能受到威胁和危险的生物物种，包括沙漠龟和莫哈韦地面松鼠等。
