Mount Roraima straddles the border between Brazil, Guyana and Venezuela.
罗赖马山位于巴西、圭亚那和委内瑞拉三国的交界处。
The rock of Roraima, however, is mostly silicate, which is also found on Mars.
而罗赖马洞穴的石头却主要是硅酸盐，火星上发现的也是硅酸盐。
The rock of Roraima, however, is mostly silicate, which is also found on Mars.
而罗赖马洞穴的石头却主要是硅酸盐，火星上发现的也是硅酸盐。
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