要明白，专注是最重要的。
The concentration of alternate stress is a key factor of fatigue destruction.
而交变应力集中是疲劳破坏的一个关键因素。
Thalli concentration is a key quality index in microbial growth process.
菌体浓度是微生物生长过程中关键的质量指标。
A good environment is the key to your concentration.
良好的环境，是使你注意力集中的关键。
Market concentration is one of the key elements in the theory of industrial Organization.
并分析了我国汽车产业市场集中度的影响因素。
The speed and the concentration are key points.
速度和浓度是关键点。
The speed and the concentration are key points.
速度和浓度是关键点。
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