求until 具体例子：Until the early 1970s,most archaeologists did not consider the coast a possible migration route into the Americans because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by g

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求until具体例子：Untiltheearly1970s,mostarchaeologistsdidnotconsiderthecoastapossiblemigrationrouteintothe

求until 具体例子：Until the early 1970s,most archaeologists did not consider the coast a possible migration route into the Americans because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by g
求until
具体例子：Until the early 1970s,most archaeologists did not consider the coast a possible migration route into the Americans because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by glacial ice.
我就不太明白 until 后面是肯定的信息的话那么其指代的时间点的前面则是否定的了么?比交困惑

求until 具体例子：Until the early 1970s,most archaeologists did not consider the coast a possible migration route into the Americans because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by g
not...,until...的句型意思是：直到.,才.
你给的具体例子的意思是直到20世纪70年代早期,大多数考古学家才开始把海岸线作为美洲人一条可能的迁移路线,因为.
主句的动作
在until后面的提到的时间前,是没有发生的.
换个句型：Most archaeologists started to consider the coast a possible migration route into the Americans in the early 1970s.

until until until until 求until you 链接 by与until的区别?请说具体些,并附上例子. until...和not until... 求until 具体例子：Until the early 1970s,most archaeologists did not consider the coast a possible migration route into the Americans because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by g until用法 until是什么意思 Until 是什么意思? Until The until you until you. Nobody,until until是什么意思? not ...until not.until.