Bats have an engineering problem: how to find their way and find their prey in the absence of light.

蝙蝠们遇到了一个技术上的难题：如何在没有光线的条件下认路和捕食。

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Aluminium is used as the engineering material for planes and spaceships and it is both light and tough.

因为铝质轻而韧性好，所以被用作制造飞机和宇宙飞船的工程材料。

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But using genetic engineering Dr Van der Meer and his colleagues have coupled the light-generating reactions in bacteria to metabolic processes associated with handling pollution.

但是借助基因工程，范德·梅尔博士和他的同事们已经让细菌中的发光反应与和处理污染有关的新陈代谢过程连结起来。

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Light engineering, service industries, textiles and woollens are the main generators of economic wealth with farming dominant in the south.

BBC: NEWS | VOTE 2003

"We brought in light engineering equipment, drills, the jaws of life, anything that can be carried portably, " said Robert Brown, a naval commander from Halifax, Canada.

CNN: O'Brien: Haiti's cultural core suffers, too

The jute mills are gone but Dundee West remains a hive of industrial and academic activity with a mixture of light engineering and cutting-edge research technology.

BBC: NEWS | VOTE 2003