His only connection to the outside world was an air tube and a bell. Each day he rang a bell to let those outside know that he was still alive.

墓内的僧人和外界的一切联系只有一根输气管和一个铃铛，每天僧人都会摇铃使外面人知其还活着。

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The noxious air likely results from a combination of natural and man-made sources, said Bell.

Bell说，有害的空气很可能是由自然和人为双重因素造成的。

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Bell was referring to an internal tube carrying air that can affect the aerodynamics of the rear wing and provide extra speed on the two long straights on the Sakhir track.

Bell 指的是赛车内部一根能够传递空气的导管，它能够影响尾翼的空气动力情况从而在Sakhir赛道的两条大直道上提供额外的速度。

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Chief executive of the air ambulance service Adrian Bell said he expected between one and four callouts across the four counties per night.

BBC: Dunsfold-based air ambulance to fly at night

The Colombian Air Force said that the Bell 212 helicopter was on a transportation mission from Barranquilla to Caucasia when it went down.

CNN: Colombian Air Force helicopter crashes, killing 13

Three cats climb to the top of the bell tower and sniff the air.

NEWYORKER: Town of Cats