1、He spends seven minutes or so on the average haircut.
他理一個頭發(fā)一般要七分鐘左右。

2、He spends on the average two hours a day on reading
他平均每天用兩小時讀書。

3、He spends on the average two hours a day on reading.
他平均每天用兩小時讀書。

4、We decided not to perform the tests on the average heavy-duty Pentium machine running Windows nt.
我們決定不在運行Windowsnt的大型Pentium機器上進(jìn)行測試。

5、On the Average Number of Unitary Factors of Finite Abelian Groups (Ⅱ)
關(guān)于有限阿貝爾群單因子個數(shù)的均值(Ⅱ)

6、The D-Ala recovery rate was 87.1% on the average in the resolution of DL-Ala.
用菌體細(xì)胞對DL -丙氨酸拆分反應(yīng)中，D -丙氨酸得率平均達(dá)87.1%。