A piece of sand,like another world of itself,could be the place of residence for many micro life forms. Therefore, we should observe things around with carefulness. Any tiny object many contain an unknow world with infinite possibilities.
The three bikini girls(or girls with swimming suits) represent the open view of new generation. It is just like many other young people wearing odd & funny dresses or even out wearing the underwears on the street.
The boss,on the other hand, is characterized as the old fashion,stubborn and conservative idea. As for Sammy, I think he is in the transition of between these two characters.
The writter of this poem is trying to reflect the flat view of value from the entire society.
我幫你翻第一段,第二段