The three conventional forms of fossil carbon-oil, coal and gas-differ both in the way the Earth stores them and the way its people use them.

煤、石油、天然气是三种传统化石燃料，其在地球上的储存方式及人们的使用方式各不相同。

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If one or more drive wheels lose their adhesion and begin to spin, 4ets can replace the action of up to three conventional differential locks, depending on the situation and need.

如果一个或多个驱动轮失去附着力并开始打滑，4ets能根据情况和需要发挥出多达三个传统差速器锁才能起到的作用。

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A new coefficient of Prandtl's relation was obtained from the experimental data. Compared with three conventional relations of friction factor, the range of Reynolds number was extended.

在实验结果的基础上提出了普朗特摩擦系数关系式的新系数，与常用的摩擦系数关系式相比，扩大了普朗特摩擦系数关系式的雷诺数应用范围。

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Under existing rules, traders have to confirm that the shares are at least available for a broker or dealer to borrow (the locate rule), and they are supposed to conform to the conventional three-day window to deliver shares to the trader on the other side of the transaction.

FORBES: Naked Short-Selling

Subsidies for wind power are three times higher than conventional electricity.

FORBES: Lessons From Lemmings: The EU's Green Power Folly

The Swedish insurance company Folksam found it performed at least three times better than 12 conventional helmets in a test for shock absorbency.

FORBES: The $500 Air Bag For Your Head