At present paper, we deduced the relative velocity distribution of mixed ideal gas molecule. Then we got the average collide frequency and average free distance.

本文导出了混合理想气体中分子相对速度的分布，并由此计算了混合理想气体中分子的碰撞频率和平均自由程。

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Researchers found mixed messages about the ideal age and ways of introducing teenagers to alcohol.

BBC: Parents' behaviour 'can influence teen drinking'

In the big emerging economies the ideal is to have a mixed banking system with a big state presence, some perky private banks, and a few foreigners to keep the locals honest.

ECONOMIST: Banks in emerging markets