As the engine becoming more intensify and its speed increasing quickly, the development and application of new model valve train getting more and more urgently.
随着对发动机性能和排放要求的不断提高，使得配气机构的开发和研制以及使用新型配气机构变得更加迫切。
In recent years, with rapid development of highway construction, some problems about highway pollution and the impact of the highway on the ecology environment etc. are increasing quickly.
近年来，随着我国高速公路建设的迅猛发展，公路污染、公路对生态环境的影响等问题也随之凸显出来。
In recent years, with rapid development of highway construction, some problems about highway pollution and the impact of the highway on the ecology environment etc. are increasing quickly.
近年来，随着我国高速公路建设的迅猛发展，公路污染、公路对生态环境的影响等问题也随之凸显出来。
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