有多少人有染头发的习惯?经常听说染发剂会对人体造成伤害。英国每日邮报的一篇报道说，现在有了一种新的染发技术，只需按下一个按钮。

染发新技术

The Daily Mail: Dying your hair can be time consuming and expensive, not to mention damaging. So most women would welcome a new invention that could change their hair colour at home at the touch of a button.

Scientists have taken the first step to making this possible and believe that a device similar in appearance to hair straighteners or flat irons, could be used to colour and even press a pattern into your hair in the future.