问题描述：
a little of one to four
Most black bearslive alone,except during mating season[a1] .They prefer to live in caves,hollow logs[a2] ,or densethicket[a3] s.A little of one to four cub[a4] s is born in January or February after a gestation[a5] period of six to nine months,and they remain with their mother untilthey are fully grown or about one and a half years old.Black bears can live aslong as thirty years in the wild ,and even longer in game preserves[a6] set aside for them.
[a1]交配季节
[a2]中空的木头
[a3]茂密的丛林
[a4]n.幼小的兽；愣头青,毛头小伙子；新手
v.（野兽）生仔；捉幼狐（幼兽）
[a5]n.怀孕；怀孕期；（思想、主意等的）构思、酝酿；孕育（过程）
[a6]禁猎区
中间那A little of one to
Most black bearslive alone,except during mating season[a1] .They prefer to live in caves,hollow logs[a2] ,or densethicket[a3] s.A little of one to four cub[a4] s is born in January or February after a gestation[a5] period of six to nine months,and they remain with their mother untilthey are fully grown or about one and a half years old.Black bears can live aslong as thirty years in the wild ,and even longer in game preserves[a6] set aside for them.
[a1]交配季节
[a2]中空的木头
[a3]茂密的丛林
[a4]n.幼小的兽；愣头青,毛头小伙子；新手
v.（野兽）生仔；捉幼狐（幼兽）
[a5]n.怀孕；怀孕期；（思想、主意等的）构思、酝酿；孕育（过程）
[a6]禁猎区
中间那A little of one to
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