破折号引出解释时，破折号前面必须是完整的句子吧？
1、A dash (—) is not the same as a hyphen.The dash,or a pair of dashes,lets you interrupt a sentence to add emphasis with additional information.Use dashes lightly or you risk creating a breathless,overly informal style.
破折号不同于连字号.使用破折号或成对破折,能够让你通过补充信息来重点解释一个句子.使用破折号可以避免句子过长,让人喘不过气来,也可以避免句子过于通俗化.
2、Use a dash to emphasize an example,a definition,or a contrast.
使用破折号来强调一个范例,一个定义或者一个对比.
Two of the strongest animals in the jungle—the elephant and gorilla—are vegetarians.
森林里的两种最大的动物—大象和大猩猩—都是素食动物.
Two of the strongest animals in the jungle are vegetarians—the elephant and gorilla.
森林里的两种最大的动物都是素食动物—大象和大猩猩.
英语使用破折号的例子如下：
1、As the equivalent of, or as a substitute for, parentheses. A pair of dashes sets off material in parenthesis more directly and decisively than a pair of commas:The Gadfly Formation—the name is the subject of much controversy—is found at only one locality in the map area.
2、To mark an unexpected turn of thought, particularly one that causes an abrupt break in sentence structure:
The Englishman must not express great joy or sorrow or even open his mouth too wide when he talks—his pipe might fall if he did. — E.M. Forster
3、 To mark the insertion of material that explains, amplifies, complements, or corrects:The outcrop consists of limestone, gneiss, and salt—an unlikely combination that had been juxtaposed by faulting.
4、To gather up the subject of a sentence when it is a very long one:Rich stores of minerals, good agricultural land, forests stretching over millions of acres, coastal waters teeming with fish, and energetic and enterprising people—all these assure Canada a bright future.The em dash is not used immediately after a colon, semicolon, or comma.
