四五人结伴而行，游览世界各地风光！留下你的足迹，让别人和你一起旅行！
Went along with four or five person visit everywhere in the world keepback your footmark let us have a trip with you together!
距今四五十万年前居住在北京周口店一带的“北京人”，能直立行走，能够制造、使用简单的工具，并知道了用火，已具备了人的基本特征。
Peking Man walked upright, made and used simple tools, and knew how to make fire.
然而，当我四五岁时我们搬到了纽约布鲁克林区，在那里我父亲成了另一桩生意的合伙人。
However, when I was four or five we moved to Brooklyn, New York, where my father became a partner in another business.
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