Element names can contain letters , digits , hyphens , underscores , colons , or full stops 元素名可以由字母,數(shù)字,連字符號(hào),下劃線,冒號(hào)或者是句號(hào)組成
Overly literal search engines reduce usability in that they ' re unable to handle typos , plurals , hyphens , and other variants of the query terms 過分依賴文字的搜索引擎降低了搜索可用性,他們不能應(yīng)付那些打字稿(掃描稿) ,錯(cuò)別字、以及復(fù)數(shù)的、加了連字符號(hào)的詞,還有變異的單詞。