软件测试是当今计算机科学与工程中起着至关重要作用的领域之一。
Software testing is one of the most important issues in computer science and engineering.
曝气在活性污泥处理方法中起着重要作用，而水中气泡上升速度对曝气作用的影响又至关重要。
Aeration plays an important role in the treatment of activated sludge, nevertheless, the velocity of bubble rising in water is of critically effects upon the aeration.
曝气在活性污泥处理方法中起着重要作用，而水中气泡上升速度对曝气作用的影响又至关重要。
Aeration plays an important role in the treatment of activated sludge, nevertheless, the velocity of bubble rising in water is of critically effects upon the aeration.
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