回複：my try

來源: 於 2011-10-06 13:16:02 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

 

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")