However, if the planet is in a good position, astronomers look for three key things: water, air and rock.

然而如果这颗行星处于很好的位置，天文学家会寻找三样关键的东西：水、空气和岩石。

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Some areas, because of their soil texture, topographical position, or distance from rivers or groundwater, have virtually no water available to plants, whereas others do.

有些地区由于土质、地形位置或与河流或地下水的距离，几乎没有水分能提供给植物，而另一些地区则有。

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However, ninjas did apparently have floats that enabled them move across water in a standing position.

BBC: Japan's ninjas heading for extinction

The committee were keen to know why Scottish Water was in a position of surplus reduction in cash terms.

BBC: Infrastructure and Capital Investment Committee 2

Weighing 140kg, with hands like buckets and a face as flat as a plate, he waded into the marquee as if against a strong current of water and assumed a position in the corner.

BBC: The life of a sumo wrestler