可选择公制或美国的标准单位，以及UTM。
这种突变体可被视为扳手套筒上可以从标准单位转换为公制单位的开关。
Think of it as switching the sockets on a wrench from standard to metric.
因此，一些国家现在使用公制系统，而其他的仍坚持使用美国的标准单位。
As a result, some states now use a metric system, while others have maintained or have returned to standard U. s. units.
麦当奴大厦为一幢多层式住宅大厦，每层2户，标准单位面积约2,519平方呎。
Macdonnell House is a high rise residential building with 2 units per floor. The typical unit size is 2,519 sq. ft.
按尺寸计算，横幅广告的观看率为23.1%，紧随其后的是矩形广告(22.7%)和非标准单位的广告(22.1%)。
In terms of size, banners represented 23.1 percent of impressions, followed by rectangles (22.7 percent) and non-standard units (22.1 percent).
浅水湾道3号位于南区起点，为一幢多层式住宅大厦，每层两户，标准单位面积分别为2,078及2,161平方呎，均为4房设计。
Repulse Bay Road is situated at the beginning of Island South. It is a high rise residential building with 2 units per floor. Typical unit sizes are 2,078 sq. ft. and 2,161 sq. ft.
这个类提供的方法可以用于通过标准的数学转换（比如 1分钟 =60秒，1天 =24小时），将时间跨度转换为标准单位（比如秒、分和小时）。
Methods on this class can be used to convert to standard units such as seconds, minutes, and hours, using standard mathematical conversions (such as 60 seconds in a minute and 24 hours in a day).
这个类提供的方法可以用于通过标准的数学转换（比如 1分钟 =60秒，1天 =24小时），将时间跨度转换为标准单位（比如秒、分和小时）。
Methods on this class can be used to convert to standard units such as seconds, minutes, and hours, using standard mathematical conversions (such as 60 seconds in a minute and 24 hours in a day).
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