an average of

Kelly had scored an average of 147 on three separate IQ tests.

凯利在3项不同的智商测试中平均得分147。

The boats remain at sea for an average of ten days at a time

这些船只每次在海上平均航行10天。

Parents spend an average of$ 220 a year on toys.

父母为孩子买玩具的花费每年平均为220元。

It takes an average of ten weeks for a house sale to be completed.

售出一幢房子平均需要10周的时间。

An average of 1500 persons pass here every day.

每天平均有1500个人经过此地.

Johnson carried the ball an average of 6 yards per rush.

约翰逊跑动带球平均每次行进6码。

The price of a PC has fallen by an average of 25% a year since 1982.

自1982年以来，个人计算机的单价年均下降25%。