In addition, the author studies a new way of weighting subjectively and discusses the three driving modes: fuel economy mode, emission mode and natural operation mode.

作者研究了一种新的主观侧重赋权值的方法，并据此讨论了车辆的三种行驶模式：燃油经济性模式、低排放模式和正常行驶模式。

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The Erie required 83 locks, each made of stone, to move boats up and down the natural elevations. The locks were designed so that each needed only one person for its operation.

运河共有83个船闸，每一个都采用石材建造，以用于提升或降低船只的航道高度，这些船闸的设计要保证只需要一个人就能进行操作。

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BP officials say the static kill is the first step in a two-part operation that involves filling the well pipe with cement to block the release of oil and natural gas.

石油公司BP负责人说，静态封杀是一项两期工程的第一步，工程将包括在油井管道中注入水泥，封堵原油和天然气的泄漏。

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The huge Firestone plantation east of the capital,Monrovia, remains the world's largest single natural rubber operation and was one of the first businesses to reopen after Liberia's long civil war.

VOA: standard.2009.09.13

These kind of projects represent a process of natural co-operation between the private and public sectors.

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They will use a bacterial agent that occurs naturally in soil and is authorised for the operation by Natural England, the government's advisor on the natural environment.

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Yannick Rondelez, a researcher in molecular programming at the University of Tokyo, is creating circuits in test tubes in a way that more closely resembles the operation of natural cells.

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