This is the first study to attempt a comprehensive global look at plankton changes over such a long time scale.

这是第一次意在全面观察全球海洋浮游生物在如此长时间里所产生的变化的研究。

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The long-term morphodynamic model is used to simulate morphologic evolution process in a long time scale, its key is to define the model representative input condition.

长周期动力地形模型是模拟长时间尺度地形演变过程的一种过程模型，其代表性输入条件是模型输入的一个关键问题。

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But the venture world has learned some hard lessons on the difficulty of building energy businesses: they face science risk, often take a long time to scale and can be capital intensive.

FORBES: Going Green: Investing In Consumer Focused Energy Tech

The electricity distributor said problems had not been on this scale for a long time.

BBC: NEWS | UK | England | Power cuts following bad weather

The auto industry has been working on so-called V2V technology for a long time but this is the first large-scale test to see how well it works in the real world.

FORBES: Get Ready For Talking Cars That Don't Crash And Get You To Work On Time