In the dry months of the year a simple ferry crosses a river in southeastern Sierra Leone; a car-carrying pontoon propelled by men with notched wooden sticks that lock to the guiding cable.

在每年干旱的几个月里，有一条简易渡轮往返于塞拉利昂东南的河流两岸。人们通过开过槽并固定在导索上的木棒推进能承载车辆的浮筏。

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Most recently, an emergency repair at the Mel Price lock and dam on the Upper Mississippi River was completed.

最近，密西西比河上游的迈尔普来斯船闸和大坝刚刚完成了一次紧急维修。

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The Nanduhe ship lock, lying at the end of river downstream and in the entrance of sea, is laid in the foundation of saturation muddy soil.

雷州市南渡河船闸位于南渡河下游末端出海口处，地基为饱和淤泥质土。

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As we cross the river, he takes us through a lock he says has been closed since Hurricane Katrina in 2005.

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An extension of the Forth and Clyde Canal is also being built, along with a new sea lock on the River Carron.

BBC: Work to begin on new ?1m canal bridge in Grangemouth

Osney Lock Hydro (OLH) has planning permission for a water turbine on the River Thames at Osney Lock.

BBC: Oxford's Osney Lock hydroelectric plant cash total raised

West Oxford Community Renewables has planning permission for a water turbine on the River Thames at Osney Lock.

BBC: Design for Osney hydro plant