寻道时间平均值一般为几毫秒，并且它取决于驱动器类型。
Seek time typically averages a few milliseconds and is dependent upon the drive type.
将计算并返回整个缓冲中的每个按键停顿时间的平均值。
The average value for each key dwell time for the entire buffer is computed and returned.
双方首次邂逅时正在服药的女性其婚姻持续时间比平均值高出两年。
Marriages last on average two years longer if the female partner is on the pill when the pair share their first encounter.
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