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.
一头用两条后腿直立行走的新泽西州的黑熊已经成为社交媒体的宠儿，距离上次被目击的几个月后，它再次出现并被拍了视频。
A New Jersey black bear that walks upright on its two back legs and has become a social media darling has re-emerged and has been captured on video months after its last sighting.
成年时，他用两只脚直立，年老时，他用一根棍子支撑着蹒跚的双腿。
When in manhood, he goes erect on two feet and when in old age, he supports his tottering legs with a stick.
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