如何预防流感英语作文带翻译

首先，我们必须每天做足够的锻炼。我们可以做运动，比如散步、跑步、做早操、玩球类运动等等。做运动可以帮助我们强身健体。Second,we'd better keep our rooms clean and the air around us fresh.We should often tidy our rooms and sweep or mop the floor.And we must often open the windows ...