Lift your brow frequently, in puzzlement or apprehension or thought, and "horizontal forehead creases," the very common "worry lines," will appear and lay like a musical staff across your forehead.

在迷惑或者忧虑或者思索的时候，经常会挑动眉毛，这会让“额头上的横向皱纹”，也即通常所说的“忧思纹”，就会出像，看起来就像额头上画了个五线谱。