However, as more research is undertaken on the causes of left-handedness, attitudes towards left-handed people are gradually changing for the better.
可是，因为更多研究承认惯用左手导致的原因，对待惯用左手的人的态度逐渐的变好了。
Research has shown that there is a genetic or inherited element to handedness.
研究显示惯用左右手的习惯是一个遗传或是继承的元素。
Research has shown that there is a genetic or inherited element to handedness.
研究显示惯用左右手的习惯是一个遗传或是继承的元素。
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