这里也有分布稀少、营养丰富的水果，而贝尔发现只有汤姆逊瞪羚才会大量食用这些水果。
There are also sparsely distributed, highly nutritious fruits, and Bell found that only the Thomson's gazelles eat much of these.
广袤的土地、稀少的人口和丰富的自然资源，使澳大利亚成为最理想的居住地。
The vastness of the land, the relative small population, and the rich natural resources make the country the most ideal place to live.
氦在地球上存量稀少，而在美国相对丰富，这与宇宙和行星的形成过程是有关的。
Helium's rarity on Earth and relative abundance in America are cosmic and planetary accidents.
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