曾经人们很担忧，由于手机听筒接近耳朵，使大脑长期暴露在电磁辐射之下，有可能会引发癌症。
There have been fears that cancer could be triggered by the brain's exposure to electromagnetic radiation emitted from mobile handsets held to the ear.
它在手机背面提供了一个抬高的区域，以助于防止你在放下它时把电话听筒划伤。
It provides a raised area at the back of the phone which helps stop you scratching the handset when you put it down.
我再不用楼上楼下来回跑，寻找手机的踪迹了。相反，我只要把基站放在一层楼上，并把无绳电话听筒放在另一层楼上就好了。
I saved myself a few trips racing up and down the stairs to find where I had left my cellphone, instead placing the base station on one floor and the additional handset on the other.
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