Within a vertical distance of just a few tens of meters, trees disappear as a life-form and are replaced by low shrubs, herbs, and grasses.

就在几十米的垂直距离内，树木这种生命形式消失了，取而代之的是低矮的灌木、草本植物和小草。

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Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees or shrubs.

"热带稀树草原位于热带地区，海拔较低，是一种稳定的生态系统，由广阔的草地和稀疏分布其中的树木或灌木组成，有些地区湿润，有些地区干燥。

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Then there is fossilized pollen, from low shrubs and grasses that once grew in the Sahara.

还有一些石化的花粉，来自于曾经生长在撒哈拉的小灌木丛和草丛。

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Slow-growth shrubs are definitely low-maintenance plants, requiring less pruning and creating less yard waste.

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