从含义上理解,被修饰的名词需要特指时,加the,反之不加 percent后面不一定加the,关键看后面所修饰的内容是特指或者泛指,例句(来自NPR) About 13 percent of those who enlist actually make it to the 20-year mark. 本例句中percent修饰的是代词,因为代词已经为特指,就无需加the,同理当不是代词但是需要特指的名词需要被percent修饰时,就需要加the,如(来自CNN): Only 10 percent of the registered voters bothered to cast ballots in the special election. Only 10 percent of Internet users have taken steps to block cookies on their machines. 第一个例句中percent修饰voters,而且句意特指那些registerd的voters 第二个例句中修饰Internet users,这里没有特指,但如果被修饰内容变成Internet users in China,就成了特指,需要加the。