Very good!
the Earth magnetic field - the Earth's magnetic field
confirmed from animals - confirmed for animals or confirmed by studying animals
long time ago - a long time ago (it is better with "a")
Very good!
the Earth magnetic field - the Earth's magnetic field
confirmed from animals - confirmed for animals or confirmed by studying animals
long time ago - a long time ago (it is better with "a")
•
回複:回複:my try
-etcacct-
♀
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10/06/2011 postreply
15:59:39