Low tide: The minimum height reached in a falling tide.

退潮：潮水退至最低时的高度。

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The ship was weighting anchor to get away before the falling tide left her stranded.

船正在起锚开动，以免落潮使它搁浅。

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Ebb-tide: the falling tide, part of the tidal cycle between high water and the next low water.

UNESCO: L O S S A R Y

Hafren Power has said it has improved on previous plans for a barrage that were rejected in 2010 by using smaller turbines that can generate power on both the rising and falling tide and at slower speeds.

BBC: Severn Barrage: Time to 'grasp opportunity', says Hain

The company says that it has improved on previous plans for a barrage that were rejected in 2010 by using smaller turbines that can generate power on both the rising and falling tide and at slower speeds.

BBC: Severn Barrage artist's impression