magoosh一道easy，求问关于破折号的用法

feng_zhaqiUID: 3715063

Most nascent memories are evanescent – unless the brain has sufficient time to make sense of them, they will ________.

dissipate
coalesce
persist
perish
triumph
cohere

这道题答案选了1,4，但是我感觉“they will ____”是应该和前面的“unless...”相连的，破折号在这里仅仅是引导一个插入语么?

cr00001UID: 3760715

they will是和前面的unless相连的,AD也是对的

除非大脑能有足够时间记住知识,知识会被忘记

xixiongUID: 3760112

Dash always represent an interruption. Basically, you can replaced it with a comma or semi-comma.

Most nascent memories are evanescent – unless the brain has sufficient time to make sense of them, they will ________.

Same as

Most nascent memories are evanescent, unless the brain has sufficient time to make sense of them, they will ________.

feng_zhaqiUID: 3715063

cr00001 发表于 2016-10-20 13:41
they will是和前面的unless相连的,AD也是对的

除非大脑能有足够时间记住知识,知识会被忘记

哦哦，是我这一下子没转过来，多谢！

feng_zhaqiUID: 3715063

xixiong 发表于 2016-10-20 13:47
Dash always represent an interruption. Basically, you can replaced it with a comma or semi-comma.
...

嗯嗯，谢谢！