In this paper, the expert system and computer simulation techniques are introduced to study the transportation alternatives of RCC at Longtan hydropower station.

引入专家系统和采用计算机模拟技术研究龙滩水电站大坝碾压混凝土的运输方案。

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Hydrogen sceptics point out not only the large capital costs associated with the production, transportation and storage of hydrogen, but also the availability of far more viable alternatives.

氢怀疑论者不仅指出了与氢制造、运输和存储相关的巨大的投入成本，也指出了可靠得多的替代能源的可能性。

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Moreover, much of Asia's oil demand is driven by transportation needs, making it difficult to alleviate with alternatives such as coal or nuclear power.

不仅如此，亚洲原油需求的很大一部分来自运输业，很难以煤炭或核电作为替代能源来缓解这一领域的用油压力。

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There, Evan Feldman, a Transportation Alternatives official, demonstrated how the bike handoff works.

WSJ: Barclays Pedals Bike Valet Service

Mr. Lander, a Brooklyn Democrat, and Transportation Alternatives, an advocacy group that endorsed the proposal, said any expansion would take years.

WSJ: Bridge Traffic On Walkway Stirs Concern

For Transportation Alternatives, which lobbies for bike- and pedestrian-friendly policies in the city, running a bike valet is only partly about revenue.

WSJ: Barclays Pedals Bike Valet Service