诗句Oranges and lemons, Say the bells of St.lement's是什么意思啊?

来自伦敦童谣
Oranges and Lemons Nursery Rhyme.

http://www.rhymes.org.uk/bells-st-clements.htm
http://ingeb.org/songs/gaygoupa.html

Bells of St. Clements

Melody -

Gay go up and gay go down,
To ring the bells of London town.

Oranges and lemons,
Say the bells of St. Clements.

Bull's eyes and targets,
Say the bells of St. Marg'ret's.

Brickbats and tiles,
Say the bells of St. Giles'.

Halfpence and farthings,
Say the bells of St. Martin's.

Pancakes and fritters,
Say the bells of St. Peter's.

Two sticks and an apple,
Say the bells of Whitechapel.

Pokers and tongs,
Say the bells of St. John's.
Kettles and