汽车品牌和型号不同，行车里程也不同，虽然根据经验车的引擎越小每加仑油可行使的里程就越长。

Mileage differ between car makes and models, although a good rule of thumb is that you should get more miles per gallon if your car has a smaller engine.

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没有订立书面合同或者合同中未明确约定为专有许可的，被许可行使的权利应当视为非专有权利。

In the absence of such a contract in writing or an explicit stipulation on exclusive license in the contract, the right so licensed to exercise shall be considered as the non-exclusive right.

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并对司法实践中一些不易把握的典型债权是否可行使撤销权进行了有针对的分析。

In addition, an analysis is especially made on whether the cancellation right of the obligee may be exercised or not for some typical creditor's rights which are hard to deal with.

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