惯用左手的人类的近亲 Our Left-Handed Cousins ; Handed Cousins
但是大多数人用右手熟练，这就使那些喜欢用左手的人生活很难。
But most people use their right hands better and this makes life difficult for the people who prefer to use their left hands.
用左手写字的人比用右手的人少。
Fewer people write with their left hand than with their right.
我们也应记住，世界上许多地方的人是用左手完成如厕动作的。
Also bear in mind that in many parts of the world, the left hand performs double-duty as toilet paper.
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