这本书是有关于地磁的.This book is about the earth's magnetism.他们发现, 牛在吃草或是休息的时候, 总是面向地磁的南极或是北极.And, when grazing or resting, cows tended to face either magnetic north or south....
Could I have an alarm call at 5.30 tomorrow, please?请在明天早晨5:30打电话叫醒我好吗?I asked for a wake-up call at 6.30 a.m.我请他们在早晨6:30打电话叫醒我。She promised to call at noon.她答应中午来电话....