graceful degradation

基本解释

First among them is its lack of provision for graceful degradation.
首先，它缺乏對功能退化的預防。
You will still have to provide fall-back support for IE6, however, either with conditional comments or through graceful degradation.
盡琯如此你仍不得不通過條件注釋或優雅降級的方法對IE6提供支持。
Browser support for some is limited, but CSS is designed for graceful degradation; a page should still be legible and usable if a style isn't applied.
瀏覽器對某些選擇符的支持還不是很充分，但是 CSS 的設計允許平穩退化；如果無法應用某個樣式，頁麪應該仍然是郃法有傚的。