这一模型可极大地简化计算工作，但却不致引起过大的误差，而且偏于安全。
Computation based on this model can be considerably simplified without excessive error and inclines to the safe side.
地面测试因安全、实用、经济而被广泛采用，但飞行测试可以校正地面测试结果所存在的误差。
Ground test methods are widely used because of safety. practicality and cost. but flight test methods can correct the error in the results of ground test.
在水文频率计算中由于误差的存在，使得估计值与实际值之间存在偏差，这种偏差导致在水利工程设计中产生了不安全因素。
Due to errors of hydrological frequency calculation, the deviation between the estimated value and actual value causes the design of water conservancy projects to be insecure.
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