border-radius

基本解釋

When the ball is painted, the border radius means that the edges are anti-aliased.
當球被畫時，邊界半徑意味著邊緣是消除鋸齒的。
To stick with the border-radius example, consider what happens when you want to target just one corner of an object.
讓我們繼續(xù)停留在這個圓角效果的例子上，設想一下假如你只想應用到一個對象的一個角上會產生什么情況。
While it’s much easier today to make curves on web pages using the canvas, CSS properties like border-radius, or just plain background images, it’s still not always trivial.
雖然用畫布、CSS屬性如border-radius，或者就用純背景圖，今天畫曲線已經容易多了，但是仍然不常見。