The company also boasts that its average consumer tips waiters 21%, slightly above the normal range of about 15-18%.

该公司还称，其用户平均给服务员21%的小费，略高于15 - 18%的普通水平。

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The world's average PM10 levels by region range from 21 to 142 ug/m3, with a world's average of 71 ug/m3.

各区域平均PM10(粒径范围为10微米的细微粒)水平范围为21~142ug/m3,世界平均水平为71ug/m3.

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This indicates how far apart the averages of two groups (in this case men and women) are, taking into account the range of values that contribute to each average.

d值可以表征两组间（这里是男性和女性）某一参数的平均值有多大差别，并且同时考虑到这一参数在各组中的域值。

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Elsewhere Wednesday morning, the Department of Energy released the crude oil inventories for the week ending Jan. 7, reporting that they are at the upper limit of the average range for this time of the year.

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Based on EPA testing, Volt owners can expect an average battery range of 35 miles, which is sufficient for modest daily commutes and weekend shopping excursions.

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Class B: Buildings competing for a wide range of users with rents in the average range for the area.

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