annual water column average 全年水柱平均值
For multiple column work, a better average is 40 to 50 characters.
对于多列页面，平均在40至50个字符每行最好。
Add an extra column following each rating to calculate your average grades for entries, exits, and completed trades.
在每个分数后面再加一列，计算你的平均进场得分，出场得分和总计得分。
A new method based on column vector average of the autocorrelation matrix without eigendecomposition is presented to estimate the channel vector.
本文提出一种基于相关矩阵列矢量平均的信道估计算法，该算法不需要特征分解或跟踪。
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