In the middle latitudes of the planet's southern hemisphere, water appears to flow off the edges of craters.

在火星南半球的中纬度地区，似乎有水在火山口的边缘流动过。

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The deformed cells block blood vessels and cut off the flow of oxygen to tissue in the body.

VOA: special.2009.12.16

Access to a Caesarean section to relieve the pressure of obstructed labor is the most common way of preventing an unborn child from pressing so tightly in the birth canal that it cuts off blood flow to surrounding tissue.

VOA: standard.2009.12.23

What goes for an airport or a bay can be scaled up to an ocean, or the air above it, and down to the flow off an aircraft's wingtip, or a ship's hull.

ECONOMIST: Lagrangian coherent structures

In 1987 it threatened to cut the flow off, and in 1990 it did so, for a month, to allow the lake behind its giant Ataturk Dam to fill up.

ECONOMIST: A new and bitter brew in the Middle East | The

Secretary of State John Kerry, on a surprise one-day visit to Baghdad, pressed Iraqi officials Sunday to cut off the flow of Iranian arms to the Syrian government and warned that future American aid to Iraq could be at risk if it doesn't.

WSJ: U.S. Prods Iraq to Stop Arms Going to Syria