The lie of the land and natural waterways made it relatively easy to build canals.这片土地的地形和天然水系使修建运河变得相对容易。The centre of the city is intersected by three main waterways.该城市中心有三条主要水道横穿。When the Berlin Wall came down it wasn't just the roads that opened up but the waterways too.柏林墙一倒，不仅是陆路，连水路也开通了。