It is a sneaky and underhand way of doing business.这种做生意的方式偷偷摸摸，遮遮掩掩。On her own ground she knows exactly what she's doing.她在自己熟悉的领域里对自己的行为有十足的把握。She is currently doing a business studies course at Leeds.她目前在利兹大学修读一门...
黄道的倾角是季节的基本成因.The obliquity of the ecliptic is the fundamental cause of the seasons.黄道面与赤道面的夹角是黄道的倾角.The obliquity of ecliptic is the fundamental cause of the seasons....