Only the wealthy could afford multiple pairs of shoes to have specific shoes to play in.

只有富人才能买得起多双鞋， 才能穿上特定的球鞋。

They cluster  in social groups, aware of the power that comes in numbers, and multiple pairs of  eyes watching the horizon for threats.

他们聚集在社会群体中，意识到数量的力量，并且有多双眼睛注视着地平线的威胁。

If I really like a pair of sunglasses, I try to get multiple pairs, because I have dogs and sometimes they get chewed up and ruined.

如果我真的很喜欢一副太阳镜，我会尝试购买多副，因为我有狗，有时它们会被咬碎或毁掉。