1·The tombs were often in the shape of pyramids.
这些坟墓通常是金字塔的形状。
2·In fact, all the pyramids along the Nile are on the west bank.
事实上，尼罗河沿岸所有的金字塔都在约旦河西岸。
3·No one is sure how the ancient Egyptians built the pyramids near Cairo.
没人知道古埃及人是如何在开罗附近建造金字塔的。
4·The pyramids of Egypt were built more than three thousand years ago, and no one knows how.
埃及金字塔是3000多年前建造的，而且没有人知道是怎么建造的。
5·There are no pictures showing the construction of the pyramids, so there is no way to tell what really happened.
"没有图片能展示金字塔的建造过程，所以就没有办法判断到底发生了什么。