用手机打电话时注意经常换边（比如从右耳换到左耳）。拨打电话时等对方接听之后才将手机放到耳边，这样可以减少电磁辐射的时间和强度。
For longer conversations , use a land line with a corded phone , not a cordless phone , which uses electromagnetic emitting technology similar to that of cell phones .
左耳