过去的将一去不复返 » The past will be gone forever 直立行走 » Walking upright 宁波港是上海国际航运枢纽港的重要组成部分，已与世界上216个国家和地区的600多个港口开通了航线。
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upright walking 比如直立行走
This manual fixation—an indirect by-product of walking upright on two legs—has helped yield numbers in most cultures, but not all.
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。
Walking upright permitted the father to use his hands to gather food and carry it to his mate from a distance.
直立行走使父亲可以用手收集食物并从远处把食物带给他的配偶。
If the small-brained australopithecines were not toolmakers, what evolutionary advantage did they gain by walking upright?
如果脑子比较小的古猿不是工具制造者，那他们直立行走的进化优势是什么？
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