When light passes from air into glass, or from air into water, it usually changes direction. We say the glass or the water refracts the light.

When light passes from air into glass當光線從空氣進入玻璃， or from air into water或是從空氣進入水裡， it usually changes direction通常會改變方向。We say我們會說 the glass or the water refracts the light玻璃或水讓光線refract(折射)了。

That is why a straw in a drink looks broken at the surface, and why a lens can make things look bigger or bring a picture to a point.

That is why這就是為什麼 a straw in a drink飲料裡的吸管 looks broken at the surface在水面上看起來像斷掉一樣， and why a lens也是為什麼一片透鏡 can make things look bigger可以讓東西看起來變大 or bring a picture to a point或是把影像聚在一個點上。

Physics teachers, opticians, and camera people use this verb; in everyday talk people more often just say the light “bends.” Though actually, students mix this up with reflect almost every time: if light bounces off a mirror, that is reflecting; if it goes through and changes path, that is refracting.

Physics teachers, opticians, and camera people物理老師、眼鏡師，和攝影相關的人 use this verb會用這個動詞；in everyday talk日常說話時 people more often just say the light bends大家比較常直接說光線「bends(彎了)」。Though actually不過其實， students mix this up with reflect almost every time學生幾乎每次都會把它跟reflect搞混：if light bounces off a mirror如果光是從鏡子彈回來， that is reflecting那是reflect(反射)；if it goes through and changes path如果光是穿過去然後改變路線， that is refracting那才是refract(折射)。

The old Latin picture is “break again” — the ray is broken off its old straight line.

The old Latin picture拉丁文原本的畫面 is break again是「再次折斷」 —— the ray is broken off its old straight line光線被折離了原本那條直線。