火花塞点燃压缩的空气燃油混合气，燃烧使混合气迅速膨胀。
The spark plug fires, igniting the compressed air-fuel mixture which produces a powerful expansion of the vapor.
网络资源的不断膨胀和新旧信息的迅速更迭，使传统的手工分检的方法难以适应对海量电子数据的管理需要。
With the ceaseless resource inflation and rapid change of information on Web, it has become difficult to manage vast e-data through traditional manual method.
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