他们发现，随着岁月流逝，具有较高腹部脂肪测量值的中年人的流体智力的测量得分较差。
They found that middle-aged people with higher measures of abdominal fat scored worse on measures of fluid intelligence as the years went by.
传统的频率特性测量方法，在低频时，测量精度较差，且非常费时。
When traditional method is used for measurement at low frequency range, measuring precision can not be guaranteed and measuring is time-consuming.
理论分析和实验表明，即使高度测量精度较差时，仍可获得满意的定位结果。
Both theoretical analysis and experiments indicate that a satisfying positioning result can be obtained, even if the altitude accuracy is poor.
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