The first members of our genus appeared between 2.4 and 2.5 million years ago, while Homo erectus, the first hominin to leave Africa, had evolved by 1.8 million years ago.
而我们人属（Homo）最早的成员出现于大约240至250万年前。 当直立人（Homo erectus）形成时，第一批人族离开了非洲，这一过程大约发生于180万年前。
Still, heel and toe depths at Laetoli provide a glimpse of efficient walking “long before the emergence of our own genus, Homo, ” Jungers says.
然而，拉多里脚印脚跟和脚趾的深度提供了有效步行的一瞬间，它“远在我们自己的Homo人类属出现之前，”蒋格斯说道。
Hainan is rich in Pahnaceae plants' species resources. This area is one of the Pahnaceae abundant places in our country. There are 28 genus, including about 50 species.
海南棕榈科植物资源甚为丰富，现有28属约50种，是我国棕榈科植物种类较多的地区之一。
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