翻下来缝外侧的边。Turn under and hem the outer edges.火车轮外侧的金属轮箱便压在这根铁轨上.Metal shoes outside the wheels of the train then press downwards on this rail.细粒粘土可以沉积在天然堤外侧的隐蔽湾中.Fine - grained clay may settle out in the sheltered bays on...

“外侧的”的英语可以翻译为：outboard，[医] lateral ...