假人在汽车碰撞安全试验中有着重要的作用，而颈部是其关键的部位。

The usage of dummy have important function in vehicle security crash test, and that, the neck is the key part of dummy.

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为了改进汽车碰撞安全等性能，对国内某轿车新产品前舱进行了优化分析。

In order to improve the performance of vehicle's passive safety and other performance, engine compartment of a domestic car was optimized.

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本文的工作对轿车的碰撞安全仿真研究具有借鉴意义，对车身结构设计、安全性能分析和交通事故处理具有参考价值。

The work has reference value for impact security simulation research, body structure design, safety performance analysis and traffic accident treatment.

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If the vehicle in the unfortunate circumstances of a collision, has to be able to maintain the security of the hydrogen which means more mass, which means a lot of the efficiency is being squandered What's the environmental impact of hydrogen production?

如果车辆,在碰撞中发生了不幸，要仍然能够保持氢气的安全性的话,意味着需要更多的质量，也就是说大部分效率被浪费了,制氢对环境有什么影响呢？

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