Some anthropologists believe that the genetic homogeneity evident in the world’s people is the result of a "population bottleneck" - at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.
语法 Sentence Correction-15391
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正确的用户笔记
小灰灰 2014-03-30 14:56:52
使用comma+ing的条件: 1) it should apply most nearly to the subject of the preceding clause; and, even more importantly, 2) it should have one of the following RELATIONSHIPS to that clause: * immediate consequence * simultaneous, but lower-priority, action
蘑菇大大 2015-06-27 19:05:27
使用comma+ing的条件: 1) it should apply most nearly to the subject of the preceding clause; and, even more importantly, 2) it should have one of the following RELATIONSHIPS to that clause: * immediate consequence * simultaneous, but lower-priority, action reducing可修饰ancestors也可修饰event，有歧义 感觉CD不够简洁
LindaYan94 2015-08-17 12:19:36
COMMA+verbING 也可以修饰主句，但是从句意分析，reducing their numbers and thus our genetic variation是明显修饰an event的！
TONITTO 2016-07-13 12:09:42
——相当于，in other word，scientist believes that A,——that B at前面需要that，使破折号前后从句平行，错 reducing逻辑主语为ancestor 不合理，错
gjf1995315 2016-06-11 20:30:27
如果用A那就是ancestors做出reduce的动作了，语义不对。B是event做出reduce这个动作，语义合理，留着。
lixiaoye1002 2016-05-12 22:23:01
——相当于，in other word，scientist believes that A,——that B at前面需要that，使破折号前后从句平行，错 reducing逻辑主语为ancestor 不合理，错
lixiaoye1002 2016-05-12 22:23:00
——相当于，in other word，scientist believes that A,——that B at前面需要that，使破折号前后从句平行，错 reducing逻辑主语为ancestor 不合理，错
FreyaDoubles 2016-03-11 17:17:58
使用comma+ing的条件: 1) it should apply most nearly to the subject of the preceding clause修饰他紧前面的这个句子; and, even more importantly, 2) it should have one of the following RELATIONSHIPS to that clause: * immediate consequence *前一个句子的结果 simultaneous同时发生, but lower-priority优先级较低, action reduing修饰模糊，逻辑意义上应该是event 导致reduce。。但是这里“comma+ing"修饰主句主语ancestors，所以错误。
Egoyiyy 2016-03-05 15:33:04
reduing修饰模糊，逻辑意义上应该是event 导致reduce。。但是这里“comma+ing"修饰主句主语ancestors，所以错误。如果reducing 前面无逗号，则可以修饰event.
海芮 2016-01-26 12:40:56
greatly 修饰前面的从句，而不是修饰event，修饰event表意更好
cailu_aria 2016-01-21 15:37:47
reducing 发出者是句子主语ancestor，错
愤怒的小飞机 2016-01-16 18:46:18
逗号后的ing不能就近修饰，逻辑主语只能是主句的主语，所以就说不通了，祖先减少他们的数量？。。
nk_pedro 2016-01-12 01:14:30
readUCing 主句的主语
