The researchers used a machine called an "electroretinogram" to test the field of vision - firing a tiny beam of light at the shark in a darkened tank from all directions.

研究人员利用“网膜电图”机测试视野——在一个黑暗的箱子里从各方位向鲨鱼发射一丝微弱的光。

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Their main application lies in the field of power transmission where axial loading in both directions occurs and a rigid axial guidance and narrow bearing width are required.

他们的主要应用是在两个方向的轴向载荷和刚性发生轴向引导和宽度窄轴承需要在输电领域。

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The authors proposed the prospects of duckweed in water pollution treatment and forecasted the directions of applications and researches in the field.

提出了利用浮萍科植物治理受污染水体的前景，同时预测了该领域的应用和研究方向。

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Being so far north, much of region - some 146, 000 square km - is covered by glaciers and ice caps (a type of ice field where glaciers flow off in many directions).

BBC: Canadian glaciers face 'big losses'

On the other hand, for a compound eye to be effective, its elements must point in lots of directions, in order to cover a wide visual field.

ECONOMIST: Brittlestar eyes

The magnetic field lines are like the two lanes of traffic on a busy road: close together, but pointing in opposite directions.

ECONOMIST: Hot stuff