1. Rarity is the attribute of a vast number of species of all classes, in all counties.
稀少现象是一切地方的一切纲内的大多数物种的一个属性。
2. LAZY summer days are a
rarity for America's firefighters, who must battle dozens of big blazes around the west.
闲适的夏天对于美国的消防队员来说是罕有的，他们肯定战斗在西部众多的火场中。
3. The
rarity bias results when individuals preferentially choose cultural variants that are less common in the population.
当个体优先选择在该群体中较少见的文化变体时，产生罕见稀有偏好。
