Some anthropologists believe that the genetic homogeneity evident in the world’s people is the result of a “population bottleneck” - (they believe) that at some time in the past our ancestors suffered an event that greatly reduced their numbers and thus our genetic variation. anthropologists是破折号前后的主语,括号中的是可以利用平行格式省略的。但是必须加that,不加的话ancestors就变成后面的主语了。 破折号的确是解释的意思,但是并不妨碍平行。 破折号后面解释的是前面的整个 "Some anthropologists believe that the genetic homogeneity evident in the world’s people is the result of a ‘population bottleneck’"。作用是用更通俗易懂的语言来表达前面整句话。 Anthropologists believe X - (they believe) Y. X = that the genetic... Y = that at some time... -- by 会员 evysy (2012/5/31 12:24:06)
NN,如果题目中出现破折号,应该如何处理呢?之前直接把它去掉,但是不是很适用...不解! |