单语范例（未经PONS编辑处理）
The understory of a high forest can be open (i.e. park-like, easy to see and walk through), or it can be dense.
en.wikipedia.org Prefers a dense canopy and more open understory.
en.wikipedia.org The underground segment opens up to a room representing the rainforest understory, which leads to a second room representing the canopy.
en.wikipedia.org Without fire, deciduous forest trees invade, and their shade eliminates both the pines and the understory.
en.wikipedia.org This is a plant of the wet forest understory and meadows above 1000 meters in elevation.
en.wikipedia.org