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i‚Pjbackground-position: center center;

i‚Qjถใ background-position: 20px 20px;

i‚Rjถ‰บ background-position: left 20px bottom 20px;

i‚Sj‰Eใ background-position: right 20px top 20px;

i‚Tj‰E‰บ background-position: right 20px bottom 20px;