一个简单的数据就能够给出解释：租一辆自驾车由洛杉矶去休斯顿的花费竟相当于起点和终点互换情况下的3倍。
One simple statistic tells that tale: it costs nearly three times as much to rent a self-drive van for a one-way journey from Los Angeles to Houston as the other way around.
首先，IQ的遗传特征竟然会随年龄的增长而表现得更明显，也就是说，随着人们年龄的增长，IQ的差异由遗传决定的程度竟逐渐提高。
One is that the heritability of IQ rises with age--that is to say, the extent to which genetics accounts for differences in IQ among individuals increases as people get older.
三绝是山中有一块巨石悬空，巨石由三根石柱支撑着，在悬空的巨石上，竟长着一棵十几米高的国家二级保护植物——榉树。
The third one is a huge rock hanging in the air. It is supported by three stone columns. On the rock even grows a water-elm, a national grade-2 protected plant, which is more than 10m high.
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