短语讲解：
1. When it comes to voter preference, a candidate’s positions on the issues count.
when it comes to当提到……；当谈到……；当涉及到……
例句：When it comes to German, I know nothing.
谈到德语,我一窍不通。
2. Researchers at Texas Tech University suggest that height affects voters’ preference in political leaders, possibly for instinctive reasons going back to caveman days.
go back回转, 回顾, 追溯
例句：The friendly contacts between our two peoples can go back to the Tang Dynasty.
我们两国人民间的友好往来可以追溯到唐朝。
3. The authors point to what’s called the "big man" tribal leadership of many ancient societies, as well as the impact of physical strength on status in the animal kingdom.
point to显示…的位置〔方向〕; 表明
例句：The hands of the clock pointed to half past eight. It was time we put our children to bed.
钟的指针指在八点半上, 我们该让孩子们上床睡觉了。
4. Researcher Schmitz writes that "culture and environment alone cannot explain how a preference for taller leaders is a near-universal trait we see in different cultures today, as well as in societies ranging from ancient Mayans, to pre-classical Greeks and even animals."
range from…to…从...变化到...
例句：Prices range from ￡6 to ￡10.
价钱从六英镑到十英镑不等。
