单语范例（未经PONS编辑处理）
Stretching for hundreds of kilometres, these include lowland rainforests, extensive wetlands, savanna grasslands, and some of the largest expanses of mangrove forest in the world.
en.wikipedia.org Behind the fields there is some secondary forest and then huge expanses of primary forest.
en.wikipedia.org Large expanses of snow were 10-15 ft deep, with some significant drifts 20 ft deep.
en.wikipedia.org From high above, it reaches down to warm a vast expanse of smoky-black earth that smells like river.
en.wikipedia.org Wine, molasses and marmalade are produced from the expanses of vineyards and orchards.
en.wikipedia.org