作为用两条腿直立行走的间接副产品，对手的过分关注帮助大多数文化产生了数字，但并非所有文化都是如此。
This manual fixation—an indirect by-product of walking upright on two legs—has helped yield numbers in most cultures, but not all.
互联网可以帮助我们弥补精神和情感上的缺陷，就像一只木腿可以弥补身体上的缺陷一样。
The Internet can help make up for our mental and emotional deficiencies as a wooden leg can compensate for a bodily deficiency.
宠物急救帮助你对狗提供基本的照顾和关注，假如你四条腿的朋友需要在一个医疗急救。
Pet First Aid helps you provide the basic care and attention that your four-legged friend might need in a medical emergency.
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