对于那些严重依赖于进口电能或是由石油转化成的电能的国家，大量使用电动汽车对整个系统来说是没有好处的。
For those countries which depend heavily on electric energy that is imported or produced from oil, mass use of electric vehicles is not necessarily advantageous for the system as a whole.
一个间接的好处是将大量耗油的老旧汽车从道路上清除，代之以更新型、更有效使用燃料的新汽车。
A secondary benefit is getting gas-guzzling old clunkers off the road and replaced with more fuel-efficient band new models.
这项专利宣称，“随着汽车使用率的上升，在红绿灯前等候的车流量可能将会越来越多，等候时间将会越来越长”，如果等候时汽车的引擎仍然还在运转的话，那么将导致大量的燃料被浪费。
The patent states that with “increasing vehicle usage there may bemore traffic and longer wait times at traffic signals,” resulting in wastedfuel if the vehicle engines are kept running.
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