science experiment
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7 defs 34 6 defs 34 2 defs 30 3 defs 24 3 defs 29 6 defs 31 3 defs 24 5 defs 26 3 defs 37 4 defs 23 6 defs 21 6 defs 21 3 defs 22 5 defs 27 3 defs 16 6 defs 25 6 defs 19 3 defs 24 3 defs 23 3 defs 25 3 defs 25 3 defs 34 5 defs 23 6 defs 24 3 defs 22 3 defs 16 7 defs 21 6 defs 20 2 defs 24 6 defs 19