大全补充题127 People who inherit the sickle cell anemia gene from only one parent seem to be resistant to malaria, an evolutionary advantage that may explain why a genetic condition so debilitating to many individuals has survived in the human population. 不明白，这里的an evolutionary-------是不是做同位语呀？如果是，难道这个同位语修饰前面整句话？不明白呀，帮忙解释一下，谢谢
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发表于 2003-12-3 17:55:00
