metric

The United States is one of the few countries that has not fully adopted the metric system.

(Chinese) 美国是少数几个尚未全面采用公制的国家之一。

You need a metric wrench to loosen the bolts on this European car engine.

(Chinese) 你需要一把公制扳手来拧松这台欧洲汽车发动机上的螺栓。